Fish
How do sharks mate? Shark sex is a rarely seen but lively business – here’s how they do it
Just how do sharks mate? Stuart Blackman explains
Great white shark: your expert guide to the ocean's ultimate apex predator that can detect blood from 3 miles away
All you need to know about great white sharks, including why they are not as deadly as often feared
Do fish drink water?
Do fish drink? or do they absorb water? Stuart Blackman takes a look
Meet the tiny shark that uses its saw-like teeth like a cookie cutter, ripping circular chunks of flesh from its prey
Discover the weird 'doomsday' fish, the eerie sea serpent-like monster that, according to legend, can 'foresee' deadly tsunamis
Meet the mysterious oarfish, the deep swelling sea serpent that's known as harbingers of doom”.
World's grumpiest fish discovered in the Red Sea. And scientists have given it the perfect name
At less than 2cm long, this grouchy goby is a tiny but fierce predator
There's a rare fish in the Red Sea that looks like a guitar – and it may soon be lost forever
The critically endangered halavi guitarfish could be extinct in a few years’ time if nothing is done to save it, say scientists
Why is the blobfish so ugly?
We take a look at why the unfortunate blobfish has been labelled as the ugliest fish in the world
Are rays just flattened sharks? No, say the experts at The Shark Trust, there's a bit more to it than that and rays and sharks are quite different...
Uncover the similarities and differences that set sharks and rays apart.
Watch incredible footage of a tiny flamboyant cuttlefish hatching from its egg. Is this the cutest baby fish in the ocean? It's certainly the prettiest
See the moment this ‘walking’ cephalopod takes its very first steps
Meet the eel that makes an astonishing 6,000 mile journey, from European rivers to the tropical Sargasso Sea - and back again
The incredible migrations of eels have long fascinated scientists. Phil Gates explores their epic journey and the reasons behind it
This blind, poop-eating cavefish from Mexico tastes with its head. Scientists just figured out why
The development of taste buds on the head and chin of the cavefish are the result of intense environmental pressures – and a penchant for bat poop – a new study has found.
Do fish have tongues?
Do fish have tongues? The answer is sort of... We explain
10 deadliest fish: you won't want to meet these fearsome species underwater
Beyond the shark! We bring you a veritable who's who of the scariest fish species lurking in the deep (and not-so-deep) waters.
Can fish move from pond to pond on duck's feet?
Just how do fish find a new pond? Could ducks feet be the answer? Stuart Blackman takes a look
“Welcome to the most spectacular show on Earth!” Diver films incredible feeding frenzy from inside a sardine mega-shoal
One of the world's most magnificent wildlife spectacles takes place from May to July every year – take a deep dive into South Africa's remarkable sardine run.
Clownfish guide: all you need to know about the amazing sex-changing, colourful real Nemo
Delve into the unique and complex biology of the clownfish, arguably the world’s most famous fish says Kush Patel
Rarest sharks in the world: Before long many of these fascinating creatures could be extinct, warn Shark Trust
Uncover the mysteries of the ocean's most elusive predators with our roundup of the world's rarest species of sharks and rays
“They are fish... but they can walk!" Amazed scientists discover exactly how mudskippers move on land
The unique anatomy of the amphibious fish has allowed it to master life both in and out of water.
11 weirdest sharks: We take a deep dive into the ocean to discover some of its strangest creatures
Celebrate the wonder and variety of these ancient, much-misunderstood fish in our list of the weirdest sharks in our oceans
More than Jaws: 34 incredible, hard to believe shark facts that celebrate this fascinating, yet much-maligned fish
Celebrate the wonder and variety of sharks, an ancient and much-misunderstood fish.
Is there really a shark that walks? Oh yes - meet the walking shark
There are a few species of 'walking' fish, but did you know there was a walking shark? Read on...
'Lord Sauron piranha': scientists name new Amazon species after terrifying Lord of the Rings villain
The newly described fish – named after Middle Earth's powerful Lord Sauron – is vegetarian, eating mainly plants.
Can piranhas actually kill a human?
Could piranhas actually kill a human? Stuart Blackman takes a look at the evidence?