Fish
6 surprising incestuous animals – and why these species prefer to keep it in the family
From wolves to cichlid fish, inbreeding has been observed in a surprising amount of species
How and why do seahorses change colour?
Marine biologist and photographer Matt Doggett answers your wild question.
Do sharks develop a taste for human flesh after a first bite?
Humans aren’t natural prey for sharks and it’s incredibly unlikely that sharks get a taste for humans after a bite
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It's 6 metres long, ugly with translucent skin and looks like a goblin with a witch’s nose and has the strangest jaw ever seen. Oh and it lives deep in the ocean too
This jaw-dropping shark is pink, nightmarishly ugly and can slingshot its jaw out of its face when it’s hungry
1,000 giant fish are mysteriously circling in this South African estuary. Scientists may finally know why
Researchers believe they may have worked out why giant trevally swim upstream in the Mtentu Estuary and circle in vast numbers.
Do goldfish really only have a 3 second memory?
Goldfish are far more intelligent than their reputation suggests...
There's a weird fish in Washington with a huge hole in its head. Scientists think they've figured out why
Researchers studying rockhead poachers from Deadman Bay think they may have solved the mystery of the fish's odd bowl-shaped head.
"We owe our existence to an unlikely moment 350- million years ago when a prehistoric fish hauled itself out of the water. But why did this just happen once?"
Study suggests adapting to life on land wasn't the biggest challenge facing fish coming ashore millions of years ago.
It's 7 metres long, can weigh almost a tonne and can live for 400 years or more – meaning some around today were born in 1625...
The mystery of the lifespan of Greenland sharks has finally been unveiled thanks to new research.
What's the rarest fish on the planet? And can they be saved?
Despite just around 38 left scientists are hopeful these beautiful vibrant blue fish can be saved from extinction
"I was simply terrified. I felt the whoosh of the current – then it was gone, leaving only a cloud of scales and blood swirling in my flashlight beam"
A surprisingly illuminating night dive with a speedy bull shark
Is nowhere safe? Watch gripping BBC footage of giant, killer fish leaping to snatch baby birds – turning the lagoon into a deadly arena
Giant trevally have incredible brains that can calculate the air speed, altitude and trajectory of a bird, taking its hunt out of the water.
From shrimp that look like candy canes to eels that mimic snowflakes: 6 festive animals named after Christmas
It's not all robins and reindeer – here are 6 festive species that are associated with Christmas
8 brutal, jaw-dropping great white shark moments captured in photos and film that expose their raw, explosive power and deadly ferocity
Awesome ocean moments reveal the raw power and regal beauty of nature’s most formidable ocean predator
Why do females often live longer than males?
Female animals tend to live longer their male counterparts, but why?
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...
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.