Fish
Pound for pound, this little fish has the most savage, brutal bite ever measured – way stronger than a great white
It might be small but it sure is mighty...
Researchers studied fish from 1,497 lakes in Michigan. What they found is concerning
Since 1945, many of Michigan's lake fish species have reduced in size, new research finds.
6 of the world's most venomous fish, from the deadly stonefish to the beautiful and dangerous lionfish
These fish are best avoided...
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10 greatest wildlife spectacles on the planet: Where and when Mother Nature puts on her biggest and most spectacular shows
Our top 10 of the largest concentrations of animals on Earth.
Sharks have a deadly secret sixth sense — and it’s more terrifying than you think
The surprisingly lethal way sharks can find and hunt their prey
“It’s like swimming inside a snow globe.” When this diver dropped into a remote reef, dozens of huge animals appeared from the darkness
The South Pass, in French Polynesia, is home to the densest population of grey reef sharks on the planet
It is as long as a cricket pitch, weighs a mighty 30 tonnes (that's three-times the weight of a T-rex) and can live for a century
The whale shark is the world's largest shark and fish species, with a maximum age estimated to be 100 years and it's thought they can reach up to 20 metres in length.
Watch terrifying, close up footage of a great white shark stalking a lone, vulnerable spear fisherman deep in the ocean
Incredible footage shows the moment a lone spearfisher encounters a great white off Sydney, Australia.
Scientists sink lights to bottom of Chicago River. What they find is incredible
Researchers say what they discovered highlights the remarkable recovery of this once heavily polluted waterway on the shores of Lake Michigan in Illinois.
Odd animal seen 'flying' over seafloor in Caribbean. But that's not the strangest thing it does
Flying gurnards tap the sand as they skim along the bottom of the ocean. Researchers say the unusual behaviour has a vital purpose.
Megafish the size of grizzly bears. But now scientists say these giants of the Mekong River are shrinking – and they know why
Once weighing hundreds of kilograms, these enormous riverfish are decreasing in size, highlighting the need for enhanced protection.
'Ghost sharks' are lurking off the coast of Washington – and they have teeth growing out of their foreheads
Researchers have discovered that the bizarre-looking spotted ratfish has a row of real teeth between its eyes.
Are sharks losing their deadliest weapon?
Ocean acidification could leave the ocean’s top predators with crumbling teeth
A 'shark-like' animal is lurking in this US river. And scientists say it's breeding
Once extinct in Georgia’s Coosa River, lake sturgeons – which can grow more than two metres long and weigh almost 100 kilograms – are now naturally reproducing thanks to long-running conservation efforts.
This brutal “feeding frenzy” is more than 7km long and only lasts 20 minutes – and scientists aren’t sure why it happens
Each year, a vast shoal of sardines travels up South Africa’s Cape coast, creating a giant feeding frenzy
It's larger than a king-sized bed and its deadly venomous spine killed Steve Irwin – and is often found buried in the sand
All you ever need to know about the stingray
It's huge, crotchety, has a fondness for head butting, and is dangerous to humans – oh and can be found in BOTH rivers and oceans
All you need to know about the fearsome bull shark
It has an eerie transparent skull that looks like a diving helmet and is the only animal on Earth to have eyes under its skin inside its head
With its see-through head, the Pacific barreleye fish is one of the weirdest fish in the ocean. Learn all about it in this expert guide from Dave Brian Butvill
It’s 3 metres long, shaped like a scythe and stuns prey – this is the longest tail on Earth
While you might think that the record holder for the world's largest tail could belong to a whale, that's not technically true
This striped beauty might be labelled one of the most dangerous fish in the sea to humans but in reality it's a little lazy and prefers to wait for an easier meal
These are one of the most easily recognisable and the most dangerous species of shark – but they are surprisingly lazy
It's the size of a double-decker bus and weighs a mighty 7 tonnes. Meet the ocean giant that cruises - through the oceans
Basking sharks are the second largest shark species in the world. They feed on microscopic animals called zooplankton.
It weighs the same as 2 grizzly bears, can be aged like a tree – meet the ocean giant that hurtles through the ocean at 44 miles per hour
Bluefin tuna are impressive fish – the largest on record was a 679 kg bluefin caught off the coast of Canada in 1979. But did you know these big beasts start off at just the size of an eyelash?
It has no scales, swims upright and grips with its tail – so why is the seahorse considered a fish?
Its upright posture, rigid body and bony armour make it look more like an insect than a fish – so what actually IS a seahorse? And what defines a true fish?
It's bigger than a king-size bed and is as flat as pancake: Meet the deadly ambush predator lying in wait on the ocean floor
Our guide to the strange looking angelshark, once common in British waters.