Fish
Longer than two school buses put together – and ruler of the oceans for 20 million years: 7 biggest prehistoric sharks ever to terrorise Earth's oceans
You might think today’s sharks are big, but during prehistory there were species that grew more than twice as large…
"He is now in full battle dress – a livery to match his mood – and aggressively defends his little patch"
Did you know bullhead fish can sing? Yes really if love's around ... Nick Baker takes an in-depth look at this fascinating fish
Do fish actually drink water?
Do fish drink? or do they absorb water? Stuart Blackman takes a look
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Is there really no such thing as fish?
It's a saying you might be familiar with, particularly if you listen to the popular podcast by the QI Elves, but how true is it? Is there really no such thing as a fish?
Can fish actually drown?
Can fish drown? What about other species that spend their lives underwater? We explain the science of breathing underwater and what can go wrong
"It seems to be a lively business…" Just how do sharks mate?
Just how do sharks mate? Stuart Blackman explains
It doesn't have any feet yet it can climb up a 120 metre high waterfall rock face – watch amazing video to see how they do it
Did you know fish can climb? Meet the amazing waterfall-climbing goby
We all know fish can swim but can they actually walk?
Some fish can 'walk' across the seabed says Laurie Jackson. Here's some of them...
"Its front teeth are sharp enough to bite through wood and bone – and bites to swimmers can result in painful wounds and even severed fingers and toes"
The silver-cheeked toadfish is making its mark in the Mediterranean, but not in a good way
"It has powerful jaws that deliver a crushing bite and their teeth are coated in toxic mucus." 10 most aggressive, dangerous saltwater fish - that bite back
Any mention of fish with teeth and we invariably think of sharks, but there are plenty more saltwater species that are capable of delivering a nasty bite.
Can any animals kill the much-feared predator, the great white shark?
Great white sharks are an epic predator but other animals can harm them to
Sharks have a deadly secret sixth – and possibly – seventh sense to locate prey — and it’s more terrifying than you think
The surprisingly lethal way sharks can find and hunt their prey
Do fish actually sleep?
Wondering if fish sleep? It's not a simple yes or no answer says Stuart Blackman after weighing up the evidence
"An endless supply of lethal razor-sharp teeth…" The astonishing weaponry of one of the world's deadliest, most feared predators
This iconic ocean predator has about 30,000 teeth - but not all at the same time.
It might act like a friend, but this is no friend – once it’s gained its victim's trust, it drugs them and tears chunks of flesh from them with its huge teeth
“Fish-prawn” hybrid filmed walking backwards in the deep sea
The deep sea fish, commonly known as armored searobin, were filmed demonstrating the unusual behaviour in the South China Sea
"She may eat parts of her own arms to essentially accelerate her own demise." 8 females with the worst, most horrible, lives ever
In the animal kingdom, it's often females that wield the power - but that doesn't mean they have it easy.
Why do seahorses look like miniature horses?
Just why do seahorses look like horses? Helen Scales explains why their equine-looking head makes them stealthy ambush predators
"In the shadow of the Himalayas swims a fish that seems to have developed a taste for human flesh…" 10 most aggressive freshwater fish
These fish will bite back - so careful where you paddle...
It has a gaping, cavernous mouth crammed with sharp teeth – and one of the wildest mating strategies in the animal kingdom
These deep-sea fish are known for their iconic lure which tempts prey close to their ferocious mouths so they can trap them in a cage of terrifying teeth
It has superpowers, the fastest punch in the animal kingdom and and is very reluctant to leave its fortress burrow beneath the ocean floor
Mantis shrimp spend most of their lives in their burrows, only leaving home to hunt and mate
This 2-metre monster latched onto a diver's face with its needle-sharp teeth and left him needing more than 20 stitches and plastic surgery…
This terrifying eel is worth avoiding because of it's ability to latch on and spin like a crocodile
It looks like seaweed, moves like seaweed – but don’t be fooled: this is a fish where the males get pregnant
It also swallows its prey whole and has an unusual mating ritual.
Expedition team has "unforgettable encounter" with one of New Zealand's most incredible creatures
In February 2025, researchers shared 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?
