Fish
David Attenborough narrates amazing BBC underwater footage of the fastest fish in the sea using their 'swords' to 'disarm' their prey
Giant predatory sailfish use their swords to 'disarm' their fish prey rather than to dismember them.
The incredible fish that scale 120 metre high waterfall rock faces with an astonishing climbing technique – watch amazing video to see how they do it
Did you know fish can climb? Meet the amazing waterfall-climbing goby
Fish can do maths, walk, fly AND pee: 14 fish facts that leave you scratching your head
Think you know fish? Think again. From farting herrons to maths geniuses, these underwater wonders continue to surprise us
Dragon of the abyss: this rarely seen deep-sea creature is like a shadow with fangs
Dragonfish are often very dark in colour, making them almost invisible to prey in the deep ocean.
When researchers sunk baited cameras into Timor-Leste’s deep ocean for the first time, they made a stunning discovery
The cameras recorded the first-ever live footage of one of the rarest deep-sea animals in the world.
This beautiful, flamboyant predator has a deadly, venomous streak...
These beautiful predators are immediately recognisable and cause chaos in many coral reefs around the world
This bizarre fish has no red blood — just antifreeze. Could it help scientists save lives?
How nature's ingenious solutions to extreme environments offers valuable insights for human organ preservation
Peculiar sea creature that looks like a spotty golf ball filmed near Vancouver Island after season-long search
These strange red animals are hard to find because they hide in rocks and kelp – but that didn't stop this underwater videographer from trying.
When marine biologists peered into this shark egg, they were utterly astonished by what they saw
The researchers documented the first confirmed case of identical twins in small spotted catsharks.
Are there any great white sharks in the Mediterranean?
There are great whites in the Med, but they shouldn't cause alarm...
Ocean photographer films "beyond mesmerising" natural spectacle in underwater cave
A photographer has shared dazzling footage from his daily visits to see thousands of fish swim together “in perfect synchronicity”.
Scientists film dramatic videos of ambush predators hiding behind sharks to hunt
The extraordinary hunting behaviour was recorded around a small, rocky island in the Mediterranean Sea.
Why scientists just bred these baby red fish with 'hands' in Tasmania
Researchers hope these adorable babies can bring this rare species back from the edge of extinction.
Weirdest fish: 16 of the strangest fish in the world, including one that can incredibly live out of water for more than two months
Our seas are brimming with strange and wonderful creatures. Meet 13 of the weirdest fish in the world, which sport everything from super-long noses to golfball heads
It's one of the most beautiful animals in the ocean – indigo blue, sleek, 4-metres long – and has weird freckles to help it hunt prey
Learn all about the beautiful blue shark
Bigmouth buffalo: the perplexing existence of Minnesota's 'age-defying' fish just got even stranger
It can live for more than a century and its cells show little sign of aging with the passing of time. Now a new study has discovered something else unusual about this curious fish...
There's a peculiar fish in the Venezuelan mountains that climbs boulders with its mouth – and biologists are obsessed with it
Researchers believe the animal – which lives in the mountains east of the Orinoco River – is the missing link between two strange fish families.
Fish Doorbell: the underwater livestream saving fish in the Netherlands
What is the Fish Doorbell and how is it helping local wildlife? Dive in for the full story...
It barks like a dog, has razor-sharp teeth and is a horror movie favourite – but is this scary-looking fish just misunderstood?
It's been made famous in horror films for its ferocious nature, but is this creature really that deadly? We find out once and for all.
Expedition team has "unforgettable encounter" with one of New Zealand's most remarkable creatures
Researchers have captured footage of nearly 30 New Zealand longfin eel ahead of their 1,000-mile migration to Tonga. After their epic journey, the eels lay their eggs and die – but how do the young get back home?
These divers spent 12 days carrying bags of shrimp and staring at fish in the Mediterranean Sea – here's why
The researchers wanted to find out if wild fish can recognise individual human beings – so, can they?
Electric organs, venomous spines and eyes that migrate – meet the world's most peculiar fish
These ambush predators can also create a vacuum that sucks prey right into their mouths.
This may be the most astonishing ambush attack you'll ever see
The zebra shark didn't see this coming...
This new species has been named after a character from Studio Ghibli – here's why
Chinese researchers have discovered a new fish species, naming it after a Studio Ghibli character because of its face paint-style markings