Fact file: Fun facts about orca (killer whales)

Orca fact file, posted by Ocean Generation.

Orca (also known as killer whales) are famous residents of the Ocean. They are fast, fashionable and family-oriented. Frankly, they are fantastic.  

What are orca? 

Orca arenโ€™t whales 

The commonly used name, killer whales, can cause confusion. Early sailors became familiar with orca hunting the great whales, naming them โ€œwhale killersโ€. Somewhere in history, that got flipped to become โ€œkiller whaleโ€, even though orca are actually dolphins. They are the biggest of the dolphins.

Orca are whales 

But the whole dolphin family, the Delphinoidea, belong to the toothed whales โ€“ the Odontoceti. Along with the Mysticeti, the baleen whales, they make up the cetaceans. So, you could argue all dolphins (and therefore the orcas) are in fact whales.  

Orcinus orca is currently a single species, although scientists have suggested dividing it into races, sub species or even different species.  

Different groups of orcas are known as ecotypes which inhabit different parts of the Ocean and show physical and cultural differences. They speak different dialects, eat different food and grow to different sizes with different colouration. In many ways they are much like humans.  

Order cetaceans explained by Ocean Generation.

Where do orca live?  

Populations can be found all over the world, typically preferring coastal seas to the open Ocean, and the higher latitudes closer to the poles. The main population centres for orca are in the Southern Ocean, the north-eastern Atlantic and in the northern Pacific, but orca can be found from Hawaii to the Arctic. 

How many orcas are there? 

There is an estimated global population of 50,000 orca, including 25,000 in the Southern Ocean, and 10,000 in the waters of Norway, Iceland and the Faroes.

The global population of orca has not been assessed by the International Union for Conservation of Nature (IUCN). We donโ€™t know enough to say whether orca populations are increasing, decreasing or stable.  

We do know about the different orca sub populations around the world. Some, such as the Iberian orca population which has been sinking boats, are critically endangered. The West Coast Community of the UK is thought to only have two members remaining: Aquarius and John Coe, who at over 60 years old may well be the oldest male killer whale in the world.  

Other orca populations are doing better. Antarctic populations are hard to study, but thought to be stable. Northern Resident orca of the west coast of North America are listed as threatened, but their numbers are increasing by an average of 2% per year after protective measures were introduced for them and their main prey โ€“ harbour seals.  

Where do orca live: explained by Ocean Generation.
Image by NOAA

What do orca eat? 

All orca are carnivores but different populations of orca have different preferred diets. Norwegian orca have specialised in herring, northeast Pacific orca hunt salmon and New Zealand orca focus on elasmobranch species such as eagle rays, stingrays and shark species.  

Two orca brothers in South African waters, Port and Starboard, are infamous for targeting great white sharks, flipping them onto their backs into a trance-like state known as tonic immobility and eating their livers. As a result, great whites leave the area when orcas are about. Other orcas have been recording other shark species such as whale sharks, seven gill sharks, mako sharks and white sharks

Nothing is off the menu. Orca will hunt marine mammals, including walrus, dolphins, narwhals, beluga and whales. Orca have been recorded recently hunting the largest animal that has even lived: blue whales.  

Being out of the water doesnโ€™t always help. A population in Patagonia will beach themselves to catch the young sea lions learning to swim in the shallows. A population in Antarctica has perfected a technique of swimming together to create waves to break up ice and wash any seals taking refuge on it into the water.

Their most surprising prey? Orca are one of the main predators of moose, who swim between islands and even dive down to eat aquatic foliage.  

Nothing is off the menu, apart from humans โ€“ no human has ever been killed by a wild orca.  

Orcas are also known as killer whales. Posted by Ocean Generation, leaders in Ocean literacy

Killer Facts about Orcas 

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Narwhals and Unicorns: How the magic of the Arctic has changed

Narwhals and unicorns: how the magic of the Arctic has changed.

Are unicorns real? Look to the Arctic Ocean.

Under a clear blue sky, icebergs silently sparkle as they float in the Ocean, occasionally nudging each other. The water between them is a deep blue and still, undisturbed.Until a twisted ivory lance pierces the air, sliding out of the water inch by inch until two metres of tusk are followed by a mottled grey head. The head directs the tusk down again, exhales through the nostrils on top and takes a deep breath, slipping into the frigid waters.

Maybe not quite how you would picture seeing your first unicorn.

Except thereโ€™s some bad news. Unicorns arenโ€™t real. We are as disappointed as you are; the closest we can come to a unicorn is a whale that lives in the Ocean:narwhals.

But there was a time not so long ago that people believed the unicorn existed.

Why did people believe unicorns existed

In the first half of fourth century BC the Greek physician Ctesias provided the first description of a unicorn.He outlined an Indian wild ass(a horse-like animal);with a crimson head and a tri-coloured horn about 28 inches long. He wrote that powdered unicorn horn acted as an antidote to deadly poisons.

Aelian, a Roman writer in 200AD fleshed out the description and noted that only noblemen could afford the horns, they were so expensive.

Early Christianity adopted the unicorn as a symbol of Christ, with the horn as a symbol of the cross of Christ.Through the belief in protection for the self and the soul, the unicorn horn โ€“ known as alicorn – became a highly sought after asset.

Unicorn horns were symbols of wealth and power, often displayed in positions of prominence on banquet tables. It was thought that the horn would bubble if dipped in a poisoned chalice, saving the wielder – a popular tool in the medieval banquet hall.

At the peak of its popularity, a complete horn was worth  20 times its weight in gold*, and even powdered horn once cost ten times.

Where did yhe unicorn myth come from? Explained by Ocean Generation, leaders in Ocean education.
Illustration from the book The history of four-footed beasts and serpents by Edward Topsell.

Unicorn horns were sought after by nobles, kings and religious leaders in Europe:  

For example, Lorenzo de Medici had one valued at 6,000 gold florins (around $1 million). Ivan the Terrible was reported to have paid 10,000 marks for one, and called for it to be brought to him on his deathbed.Martin Luther was said to have been saved from an assassination attempt by powdered unicorn horn, and had a spoon made from the magical substance.

Such a powerful tool befits a queen, and on hearing that Mary Queen of Scots was using unicorn horn to test her food for poison, Elizabeth I offered a handsome reward for another.Privateer and Arctic explorerMartin Frobisher(or&Humphrey Gilbert, both were on the expedition, but different sources credit them) found a narwhal washed ashore in Canada and gifted it to the queen.She was enamoured with it and covered it in jewels. It was said to be valued at ยฃ10,000*, approximately ยฃ3 million in modern terms. She also handed a gilted and bejewelled unicorn horn drinking vessel down to James I.

Even the Pope, one of the main focal points of power and wealth at the time, was involved.Pope Clement VII gifted Francis I of France a unicorn hornon a silver stand.

In the 1660s, King Frederick III ordered the building of a coronation chair. This chair was made using several unicorn horns and served as the centrepiece of Danish coronations until 1840.

But as we know, unicorns arenโ€™t real. Where are these horns coming from?

Unicorn horns were sought after by European nobles. Posted by Ocean Generation.
The Trustees and Factor and Commissioner of the Walker Trust / National Museums Scotland

Where did tales of unicorn horns come from?  

Most of the Roman and Greek accounts of unicorns were;likely based on stories from travellers coming across rhinoceros in India and Africa. But after these initial accounts describing the horn as straight, Christian art from about 1200 changed its view of the unicorn.

Unicorns now had spiralled horns. There is only one animal that possesses a straight, spiralling โ€˜hornโ€™ โ€“ the narwhal (Monodon monceros).And it isnโ€™t a horn at all, but a tooth.

Christian art from about 1200 depicted unicorns with spiralled horns.

What you need to know about narwhals: unicorns of the sea 

The name comes from the Old Norse nรกrhval, meaning corpse whale. Narwhals have mottled grey skin not dissimilar to rotting flesh and like to lounge at the surface โ€“ behaviour known as logging. Combine the two and you can understand why the Viking explorers named them.

Narwhals are homebodies. They have โ€˜high site fidelityโ€™ -meaning they stick to the places they like and will go back to their favourite spots. They can be found in the Canadian Arctic, through to East Greenland,Svalbard and the western Russian Arctic.

What is a narwhalโ€™s โ€˜hornโ€™? 

The โ€˜hornโ€™ of a narwhal is one (or in rare cases two) of the incisors,so is a tusk rather than a horn at all. All narwhals have two tusks embedded in their top lip.

Most commonly, males in their 2nd or 3rd year will have the front left tusk erupt through their top lip, growing with age to reach 1.5-2.5m long. Around 3% of narwhals are anomalies, with some females growing tusks, some males growing two or none at all.Double tusks in narwhals are about as common as an extra finger in humans.

What do narwhals use their tusk for? 

The use of the tusk is still under debate.

The first theories were that narwhal tusks were used for piercing prey or breaking up ice to make breathing holes. Observers supposed they could also function as a defensive mechanism or a cooling system. However, these theories are either discredited or unproven. The real uses are even more spectacular.

What do narwhals use their tusks for? Explained by Ocean Generation.
NIST/Glenn Williams

Dental Displays 

Studies suggest that narwhal tusks are sexually selected. Male narwhals will use their tusk as a display feature in competition with each other, and bigger is better. The size of the tusk has been shown to positively correlate with teste size โ€“ so could be an easy indicator for the females to see which males are most fertile. Sometimes, size does matter.

Where males with similar tusks meet, they may fight โ€“male narwhals show far more scarring on their heads than juvenile and female narwhals and 40-60% have broken tusks, but this hasnโ€™t ever been observed.

What is sexual selection?
Sexual selection is a special type of natural selection, where traits that increase reproduction will be passed on. 

Fish Fencers 

But it isnโ€™t just for showing or skirmishing. Using drones to study the narwhalsโ€™ behaviour, researchers saw the tusks in action. They could use the tusk to guide the fish, chasing it. They even saw the tusk being used, as a thresher shark uses its tail, to hit the fish, stunning it ready for eating. The scientists involved think there could even have been an element of play.

Temperature Taster 

In 2014, we discovered that a narwhal tusk was full of holes and nerves. This could mean that it can operate as a water sensing tool for the narwhal, and they can โ€˜feelโ€™ changes in water saltiness (salinity) and temperature. They show elevated heart rate when the horn is exposed to very salty water and fresh water, suggesting they can detect it.

โ€˜Feelingโ€™ your surroundings can be very useful for navigation, when diving deep and moving between their favourite spots. It could also save their lives. Seawater freezing depends on the temperature and salinity of the water โ€“ saltier water needs to be colder before it freezes. By knowing the temperature and salinity of the water they are in, they are detecting when the water is likely to freeze, trapping them from the air to breathe.

This could also be used in hunting โ€“ those narwhals weโ€™ve seen using their tusks to โ€˜chaseโ€™ fish? They could be using their swirly sensor to detect the fishes’ movements through pressure changes in the water, even faster than they can see them

Are narwhals magic

So, we have a tooth that helps guide them through the icy waters like Rudolph’s nose, zero in on prey like a laser guided missile and show off their suitability to be a parent.

A narwhal’s tusk could enable them to tell when ice is going to form and find prey hiding in the dark as they can dive over a kilometre (3,281 ft) down, where no light can reach.

Unicorns might not be real, but this all sounds like magic.

Does something lose its magic just because we understand how it works?Whether it is magic or incredible biology, the enchantment of the narwhal is threatened by a changing world.

How is the narwhalsโ€™ world changing

The opinions and doting of nobles across Europe and the world meant nothing to the narwhal.After years of hunting operations, narwhals are now enduring other changes, this time in their home. Climate change, caused primarily by the human burning of fossil fuels, is hitting the polar regions, where narwhals live, the hardest.

The Arctic is warming faster than the rest of the world. This is known as polar or Arctic amplification(AA). AA has resulted in the Arctic warming by as much as four times the rest of the globe. Since 2006, the air temperature in autumn and winter has increased by more than twice the global average.

Narwhals live around the Arctic Ocean. Posted by Ocean Generation.
https://doi.org/10.1016/j.marpol.2013.10.005

Why do narwhals live in the Arctic Ocean

Narwhals like it cold.Where the sea is warmer, there are less narwhals. Why? This could be to do with their prey โ€“ one of their favourites, cod, are known to grow better in water temperatures of less than 2 degrees.

It could also be to do with their supreme adaptions for the coldest places on the planet โ€“ they may overheat at higher temperatures. No one wants to be wearing a thick winter coat on a hot summer’s day.

How is climate change impacting narwhals? 

There is less ice. November 30 2025 saw the lowest area of Arctic ice on that date on record. The previous 20 years have given us the 20th lowest sea ice minimums on record, and there is 95% less old sea ice (over 4 years old) than the average from 1979-2004.

Ice is an important part of the lives of every animal living in the polar seas.The loss of sea ice has been shown to change the diet of the narwhal as they canโ€™t eat ice-based (known as sympagic) prey, so they eat more open-water (pelagic) species instead.

Through burning coal and mining for gold, humans have increased the amount of mercury in the environment.Less ice means there is more bioavailable mercury. The result: the narwhals are exposed to more mercury.Increased mercury levels can impact the reproduction and immune systems of narwhals. How do we know this? Through analysing narwhal tusks, which give us an insight into their life history. The magic tusks are whispering to us.

The reducing ice also means there is more human activity. We are a noisy bunch, and narwhals have shown to be sensitive to ship noise, reducing their deep dives for food (and given they are inefficient in their dive success, they need them).

The Arctic Region is warming four times faster than the rest of the world.

How are we preserving the magic of the Arctic? 

Narwhal hunting is monitored and almost every whale caught is for the subsidence of the indigenous Inuit people. The population is difficult to track, especially without a reliable baseline. However, the International Union for the Conservation of Nature assessed the population in 2017 and shifted the status from Near Threatened to Least Concern. The narwhal is doing well so far.

The isolation of the Arctic and the changing attitude towards cetaceans means the narwhal hasnโ€™t had to deal with a multitude of human pressures. But more than ever, those pressures are finding them where they log.

Research will continue to develop quieter boats, and policy will increase protected areas. The narwhal is one example of a bit of remote magic we are trying to keep.

Climate change is being tackled head on, with an energy transition in full flow, electric vehicles going from strength to strength and global emission increases are slowing. We will be the generation to see the transition to human flourishing not coming at the cost of our natural world, for the first time.

But within this, driving this, is being able to see the magic of the unicorn, not as a made-up money-making monopoly manufacture, but in the reality of the narwhal and its beautiful, magical tooth. See the magic, spread the magic โ€“ that is what will lead to us protecting the magic.

*Wexler, P. (2017). Toxicology in the Middle Ages and Renaissance. Academic Press.
Cover image by ะŸั€ะพะตะบั‚ะฝั‹ะน ะพั„ะธั ะะฐั€ะฒะฐะป

Secret life of algae: From oxygen to algae blooms

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17 Science-backed ways the Ocean keeps you alive

Science-backed ways the Ocean keeps us alive.

Youโ€™re alive because of the Ocean.  

Weโ€™re exploring some of the many ways the Ocean keeps us all alive. It gives us the air we breathe, the rain that waters our food, climate stability and incredible biodiversity that keeps our planet thriving.  

And yet, most of us donโ€™t realise just how much we rely on the Ocean every single day. 

Here are 17 science-backed ways the Ocean keeps us, and all life on Earth, alive.  

1. The Ocean is an oxygen factory  

Over 50% of the oxygen you breathe comes from marine plants (who rely on a healthy Ocean to survive. Big shout out to microscopic phytoplankton, doing the heavy lifting!). 

Btw, that’s more than all the rainforests combined. 

Over half of our oxygen is provided by the Ocean. Posted by Ocean Generation.

2. Heat absorber  

Our Ocean absorbs +90% of excess heat trapped by greenhouse gases. 

Without the Ocean, Earth would be scorching. 

3. Climate regulator  

Ocean currents redistribute heat, making life liveable. Ocean currents make it cooler in summer and warmer in winter all across the world.

4. Carbon sink  

The Ocean is one of the largest carbon sinks on Earth. Various marine ecosystems store carbon plus allllll the animals and plants = natural carbon capture technology.  

When animals pass away and sink to the bottom of the Ocean, they lock carbon deep in the Ocean.  

The Ocean is heat absorber, climate regulator and carbon sink

5. Key player in the water cycle 

The amount of freshwater we have on Earth is fixed. And the Ocean? It powers the water cycle: evaporation, precipitation, and storm formation. 

No Ocean = no rain = no drinking water = no crops = no people. 

How does the water cycle work? Posted by Ocean Generation

6. Food source  

+3 billion people rely on fish as a key source of protein. Fisheries also support jobs, economies, and cultures.

And ecosystems like coral reefs and mangrove forests nurture little fish (like Ocean nurseries). 

7. Ocean = weather controller  

Ocean temperatures drive weather events like monsoons, hurricanes and El Niรฑo. So, a warm Ocean = stronger storms (bad). A cooler Ocean = more weather stability (good). 

Until itโ€™s too hot, our Ocean will keep regulating the worldโ€™s weather patterns. 

8. Biodiversity  

Most biodiversity = within the Ocean.  

Coral reefs, deep-sea ecosystems, the open Ocean: they all have unique ecosystems that are VITAL to the overall balance of our planet.  

Biodiversity in the Ocean. Posted by Ocean Generation

9. Blue carbon ecosystems = defence systems  

Coral reefs, mangroves, and seagrasses protect our coastlines. They guard against erosion, flooding, tsunamis and other disasters. 

Considering about a third of the global population (2.5 billion people) live within 100 km of the coasts, this is a very important way Ocean ecosystems support us. And these ecosystems will be CRUCIAL as sea level rises.  

10. Dr Ocean, reporting for duty  

There are MANY marine compounds (over 20) that are used/ studied for medicines. The Ocean, and its creatures, help us develop medicines for: cancer, Alzheimerโ€™s, infections and general pain. 

11. Ocean currents keep food webs healthy 

Ocean currents move nutrients across the world. These nutrients fuel marine food webs. One example is marine snow (tiny bits of decaying matter from dead organisms that slowly drifts from the surface which becomes food for deep-sea animals.  

12. Culture and economic impact  

There are numerous Ocean-based industries that generate trillions. Think of shipping, tourism, fishing and marine renewable energy. These industries, which rely on the Ocean, support millions of jobs and centuries of cultural heritage. 

The Ocean keeps us alive, no matter where we live.

13. The origin of ALL LIFE ON EARTH  

Scientists predict that all life began in the Ocean (in hydrothermal vents in the deep-sea.)  

14. Cooling Earthโ€™s core 

Cool Ocean water is carried to Earthโ€™s mantle which regulates geothermal heat flow over extended periods of time. 

15. Solar radiation, be gone 

Sea ice and the surface of our Ocean act as a reflector of solar radiation. Losing ice = more heat absorption = hotter planet = not good.

16. Ice cores hold the secrets of our climate 

Ocean sediments and ice cores preserve millions of years of Earthโ€™s climate and carbon dioxide history. This makes our Ocean a vital archive of climate science and information. We use these findings to model future predictions of our climate and weather patterns.  

Ice cores hold the secret of our climate. Explained by Ocean Generation.
Image credit: NASA’s Goddard Space Flight Center/Ludovic Brucker

17. Speedy carbon storage 

I already mentioned blue carbon ecosystems (like mangroves, salt marshes and seagrasses and how they protect our coastlines). But! These ecosystems store carbon up to 10x faster than land-based forests.  

No matter where you live, the Ocean is keeping you alive.  

Whether the Ocean is stabilising the climate, powering the water cycle, feeding billions, or buffering us from storms, itโ€™s Earthโ€™s life support system. 

But hereโ€™s the catch: our Ocean canโ€™t keep protecting us if we donโ€™t protect it. 

As you scroll, sip, breathe and go about your day, remember a healthy Ocean is essential for a healthy future. For you. For me. For ducks. For everyone. 

If the Ocean thrives, so do we. Posted by Ocean Generation.

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12 interesting coral reef facts

Bright yellow fish next o a coral reef. Shared by Ocean Generation in an article about interesting coral reef facts.

Coral reefs are one of the most important ecosystems on Earth.

What makes coral so brightly coloured? Why do they turn white when they’re unhealthy? We’ve got you covered. Below, we’re sharing 12+ fascinating facts about coral reefs: The most biologically diverse ecosystem on Earth.

Corals reefs are large skeletons (because theyโ€™re made up of tiny animals a.k.a. โ€˜coral polypsโ€™). They’re home to hundreds of plants and organisms, support fisheries and may host the answers needed to develop new cancer medication. 

How many of these coral reef facts do you know?

Close up of dark blue coral reef in the Ocean. Shared by Ocean Generation: Experts in Ocean health since 2009.

1. Coral reefs occur in more than 100 countries and territories whilst covering only 0.2% of the seafloor. They reside in tropical and semi-tropical waters.  

2. The single-celled algae, zooxanthellae, that live in the tissues of the coral polyps can fuel up to 90% of the reef-building coralโ€™s energy requirements for growth and reproduction. Additionally, zooxanthellae are responsible for the vibrant colours of the corals!  

3. In return, the corals provide them with a home to reside in and nutrients to aid photosynthesis. Thus, fulfilling a mutually beneficial (โ€˜symbioticโ€™) relationship! 

Colourful coral reef, bursting with life. There's a sea turtle and some orange fish swimming in the Ocean around the reef.

4. A healthy coral reef can limit coastal wave energy by up to 97%. That alone makes corals a crucial shoreline protector, like some other coastal ecosystems.

Coral reefs protect around $6 billion worth of built infrastructure from flooding around the world, from an economic perspective.

5. Large scale losses of coral reefs are due to a warming Ocean and climate change.

Land-based pollution of nutrients and sediments from agriculture, marine pollution, overfishing and destructive fishing practices, and outbreaks of coral diseases and crown-of-thorn starfish (see below image) are all causes of local coral losses. 

Large, purple crown of thorn starfish on the seafloor in the Ocean. These starfish threaten the livelihoods of coral reefs. Facts about corals shared by Ocean Generation.

6. Coral reefs support at least a quarter of all marine species. What’s more: Coral reefs are a home to an average of 830,000 species (550,000 โ€“ 1,330,000). The range varies widely due to large populations of small cryptic species being difficult to sample.  

7. Astonishingly, scientists estimate that roughly 74% of coral reef species remain undiscovered! 

8. Ocean acidification is a major threat to coral reefs.

The decrease in pH (making water acidic) hinders corals and other organisms from forming their skeletons. This makes them especially vulnerable in juvenile stages.

The weakening of these skeletons also results in habitat loss, low reef biodiversity, coastline erosion etc. 

9. Coral reefs subjected to higher temperature levels increase the likelihood of abrupt and irreversible changes. According to the IPCC, a record-shattering warming world of 1.5ยฐC would mean a 70-90% decline in coral reefs.

10. Coral reef associated fisheries provide 70% of protein in the diets of Pacific Islanders. These fisheries support around 6 million people and are worth $6.8 billion annually.  

Coral in the Ocean experiencing coral bleaching. Corals turn white when they're bleached.

11. Corals can turn white due to coral bleaching. Climate change is a major driver of coral bleaching, and this process disrupts the symbiotic relationship with zooxanthellae.  

As the algae is dispelled by the corals in an attempt to protect themselves, the corals vulnerability increases and they lose a major energy source. If the heat stress persists, corals are likely to die.  

Hands near the shoreline of the Ocean holding an unhealthy piece of coral. The coral is bleached white because of climate change. Image shared by Ocean Generation, experts in Ocean health and understandable environmental science.

Over half of the our coral reefs are already lost.

12. Coral restoration is a relatively new nature-based solution. Nature-based solutions refers to an umbrella of methods for reviving ecosystems in the face of adversity. 

A 2020 review stated that coral restoration projects report a survival rate between 60-70% with a report stating that 1.5C warming would render this solution to be ineffective.

The authors of the review noted that most projects are small-scale and that weโ€™ll still require large-scale climate action to tackle the root of this issue. 

With over half of the worldโ€™s coral reefs already lost, it is evident that coral reefs are declining due to a multitude of human pressures.  

Some warm water corals have reached adaptation limits. Nevertheless, scientists and local communities are working extremely hard to continuously build on existing solutions and quickly adopt innovative approaches. 

The existential threat of the rise in global temperatures means that climate change action is urgently needed to establish coral reef resilience.  

Act now.

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Facts about Vaquitas: The most endangered marine mammal

10 interesting facts about the vaquita: The most endangered marine mammal in the world, shared by Ocean Generation and Barry M. Illustration: Chris Clayton

How many of these facts about vaquitas do you know?

The vaquita (Phocoena sinus) is the smallest porpoise to call our Ocean home.

In 2023, the best-known estimate of vaquita populations is between 6 – 19, making them the most endangered marine mammal in the world.

1. When was the vaquita discovered? 1958.

The vaquita was was only discovered in 1958 – yet it’s already on the brink of extinction.

Scientists first described these little porpoises after coming across three skulls found in the Gulf of California, Mexico.

2. Vaquitas are endemic to the Gulf of California, Mexico.

Vaquitas display no migratory behaviour and have limited themselves to the Northern part of the Gulf of California, as depicted in the figure below.

Where are vaquitas found? Map showing the Gulf of California, Mexico and the very limited area, in the Northern part of the Gulf of California, where vaquitas live.

3. How big do vaquitas get?

They grow up to 1.5m long (5 feet). Vaquitas live in relatively shallow waters (<50m) and have been observed individually, in pairs, and small groups of up to 8-10 individuals.

4. No one really knew what vaquitas looked like until the late 1980s.

Locals, along the Gulf of California, didn’t know much about vaquitas before they were described, based on their skulls in 1958, but anecdotal evidence from locals include references to โ€œvaquitaโ€(meaning little cow), โ€œcochitoโ€(meaning little pig) and โ€œduendeโ€(meaning ghost or spirit).

There’s a chance that these names could have been referring to totally different species.
In the late 1980s though, external features of vaquitas started to be described.

5. So, what do vaquitas look like?

A dark ring around the eyes is the vaquitas most striking feature, along with a proportionally large dorsal fin. They’re unique among porpoises because they’re the only species of the porpoise family found in warm waters.

6. When did the vaquita become endangered?

In 1978, the IUCN red-listed the vaquita as โ€˜Vulnerable.โ€™ In 1990, vaquitas became โ€˜Endangeredโ€™ and, in 1996, โ€˜Critically Endangered.โ€™

7. Why are vaquitas endangered?

The main reason vaquitas are endangered is due to entanglement in gillnets with bycatch in legal and illegal fisheries for shrimp and finfish, and in the last decade, specifically for totoaba.

A gillnet is a wall or curtain of netting that hangs in the water.
A gillnet is a wall or curtain of netting that hangs in the water. Image source.

8. How many vaquitas are left?

In 2007, there were an estimated 150 vaquitas in our Ocean but by 2018, that number had dropped to 19.

A table showing vaquita populations over time, from around 245 vaquitas in 2008 to less than 19 in 2019. There are less than 20 vaquitas in the world.
Vaquita population size over time [Extracted from  Wรผrsig B. et. al., 2021]

9. Is there hope for vaquita populations?

Conservation efforts for vaquitas are underway.

Gillnet fishing – has been banned – however, illegal fishing of totoaba (an endemic fish) continues. The totoaba is also critically endangered too so, the fate of the totoaba and vaquita are closely linked.

There is always hope.

Scientists suggested imminent vaquita extinction in the mid-2000โ€™s but as of 2023, there are still between 6-19 vaquitas alive.

One study on genetics found that due to low population size and low genetic diversity, if gillnet fishing was 100% stopped, there is only a 6% chance of extinction of vaquitas.

This is possibly the first photo published of a vaquita in nature, on a rather placid sea, taken on 10 March 1979. Photo by R.S. Wells, shared by Ocean Generation.
This is possibly the first photo published of a vaquita in nature, on a rather placid sea, taken on 10 March 1979. Photo by R.S. Wells. 

10. The vaquita can give birth annually.

And multiple newborns were sighted in 2019.


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7 Interesting travel facts, linked to the environmentย 

Plane ascending into the sky. Ocean Generation is sharing 7 interesting travel facts linked to the environment in this article.

How much do we need to reduce travel emissions to meet the targets set out in the Paris Agreement?”

Good question! Perhaps you’ve also wondered how much worse the private jets celebs catch are, compared to commercial planes, or how much more we drive than walk?

Here are 7 interesting travel facts linked to the environmental:

Teal travel van parked against the backdrop of a coastal road. There's a blue sky, a stretch of Ocean, and lush wild grass with a few flowers. Shared by Ocean Generation in an article about interesting travel facts with an environmental lens.

1. Transport-related CO2 emissions would need to be curbed to 2Gt or 3Gt by 2050, or 70-80% lower than 2015 levels to meet the Paris Agreementโ€™s 1.5C limit.  

2. More passengers per vehicle = lower individual emissions.  

The transport sector causes substantial negative impacts on the environment and human health. Image of a close up of a car exhaust with CO2 being released.

3. A double decker bus, a clever form of public transport, can replace up to 50 other motorised vehicles.

4. Making cities walkable, i.e., making it easy to travel around a neighbourhood on your own two feet, reduces greenhouse gas emissions by 4 tonnes a year when compared to automobile-dependent areas.

The avoided emissions are equivalent to 2-person round trip flying economy between Paris and New York. ย 

5. We now drive seven times as much as we walk. ย 

6. In 2016 most passengers in the UK (72%) were flying for leisure. ย 

7. Private jets are 5-14 times more polluting than commercial planes (per passenger) and about 50 times more polluting than trains.

The amount of space taken up on a road by 50 pedestrians vs. 50 cyclists vs. 50 people on a bus vs. 50 people in 33 cars. This image is shared by ocean Generation in their article about interesting travel facts through an environmental lens.
The amount of space taken up on a road by 50 pedestrians vs. 50 cyclists vs. 50 people on a bus vs. 50 people in 33 cars. Source: Philadelphia Inquirer

Our planet doesnโ€™t need a handful of perfect environmentalists. It needs millions of imperfect people doing what they can to make a difference, and always trying to do better. ย 

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15 Plastic Pollution Facts You Should Know

15 science-backed plastic pollution facts, shared by Ocean Generation: experts in Ocean health since 2009. Read to learn about marine pollution, microplastics, and how plastic impacts human health.

We’ve become dependent on single-use plastic products.

And the reason why isn’t hard to find. Plastic is cheap, convenient and was made to last forever – but as plastic pollution has severe environmental and health consequences for our blue planet.

Understanding key facts about plastic pollution is the first step to rethinking our relationship with it, and ensuring a healthier, more sustainable future all life on Earth.

We’re breaking down 15 facts about plastic pollution – backed by science and our expertise as experts in Ocean health since 2009. Find out how plastic enters the environment, its impact on wildlife, what microplastics are, and how it effects our health below. 

15 Plastic pollution factsย you need to know:

1. Up to 422 million tonnes of plastic are being produced each year.


The amount of plastic produced every year weighs more than all of humanity (estimated at 316 million tonnes in 2013).

2. Up to 12.7 million tonnes of plastic enter the Ocean every year.


If waste management practices don’t improve, scientists predict this amount could increase tenfold by 2025.

Single-use plastic items are the biggest contributors to marine litter (it is estimated that 1 – 5 trillion plastic bags are consumed worldwide each year).

3. Plastics make up to around 75% of marine litter, although this can be up to 100% at some sites. 


Plastic in the Ocean breaks up into smaller fragments called microplastics, which have been identified in commercial fish and thus, consumed by humans.

4. Plastic in the Ocean breaks up into smaller fragments called microplastics.


Plastic will never go away. These microplastics have been identified in commercial fish consumed by humans.

What are microplastics?

Microplastics are small plastic pieces measuring less than 5 millimetres.

While some microplastics are intentionally made small (like microbeads in facial scrubs and industrial abrasives used in sandbags), others have been formed by breaking away from larger plastic products.

Due to large amounts of plastic pollution, microplastics can now be found everywhere on Earth – from Mount Everest to the Mariana Trench; the deepest part of our Ocean.

Explained: What are microplastics, where do they come from and what can we do about them?
Read: For the first time, in March 2022, plastic was found in human blood.

5. Half of all plastics are single-use applications, meaning they’re used just once and disposed of.


We are all guilty of using single-use plastic items. From shampoo bottles to make-up products, plastic forks, and straws – single-use plastic is part of our daily lives.

Small behaviour changes can make a massive impact in reducing the flow of plastic pollution to the Ocean.

The next time you’re at the store, reaching for a single-use plastic item, stop and consider: Is there a more sustainable product I can use? If not, think of ways you can reuse your plastic items instead of discarding of them once you’re done.

6. Plastic was invented 150 years ago.


When we see the stat, ‘Plastic takes 450 years to decompose’ we reply, ‘How is that known?’ Plastic hasn’t been around long enough for us to confirm that.

Instead of breaking down, it’s more accurate to say plastic breaks up.

Plastic is indestructible; it was designed to defy nature, and designed not to decompose. Plastic just gets smaller, making it harder to remove from the Ocean.

7. Birds are highly susceptible to plastic ingestion.


It is estimated that over 90% of all seabirds have ingested plastic.

8. There is no giant floating island of plastic at the centre of the Pacific or any other parts of the Ocean.


The so-called Great Pacific Garbage Patch is invisible from the surface.

Plankton nets, however, reveal the true nature of the plastic problem: An accumulation of microplastics that fill up each net in concentrations that increase towards the Ocean’s centre.

9. Plastic acts as a sink for chemicals in the environment, and transports them.


When plastic is mistakenly consumed by marine life, plastic chemicals are released and stored in the fatty tissue of the animal. 

Those chemicals travel up the marine food chain, magnifying in concentration on their way up. Eventually, the plastic in fish reaches and gets consumed by people.

10. Chemicals are added to plastic during its production.


Chemicals are added to plastics to give the products certain properties. Some of the chemicals, known endocrine disruptors, have been linked to critical diseases including birth defects, cancer, autoimmune disease, infertility and cognitive and behavioural disorders.

So, plastic isn’t just polluting our Ocean – it’s polluting our bodies.

11. Crustaceans tested at the deepest point of our Ocean have ingested plastic.


Animals from the deepest places on our blue planet have been found with plastic in their stomachs, confirming fears that man-made fibres have contaminated the most remote places on Earth.

12. People living along rivers and coastlines are the most impacted by plastic pollution.


It’s been reported that China, Indonesia, the Philippines, Thailand, and Vietnam are the most impacted by plastic pollution.

13. Low-income communities face more health impacts near plastic production sites.


Communities with low incomes have greater exposure to toxins and plastic waste, and bear the brunt of the impacts of improper plastic disposal and incineration.

14. Annual plastic production has skyrocketed since the early 1950s, reaching 322 million tonnes in 2015.


These numbers do not include synthetic fibres used in clothing, rope and other products which accounted for 61 million tonnes in 2016.

The World Economic Forum (WEF) predicts a 3.5 – 3.8% growth in plastic production per year through 2050. As of 2019, we’re seeing proof of this – with production of single-use plastics increasing despite our growing awareness of their negative impacts.

15. Bioplastics are not not as green as they seem. Approach with caution.


Though companies often market bioplastics under the same umbrella as biodegradable products, they are not necessarily biodegradable.

Most bioplastics require very specific conditions to break down effectively. They also do not solve the litter or throwaway culture problem.

What is plastic – really?

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