Marine Animals
Barely the size of a grape, it's able to take on the deadly Portuguese man o’war — and can deliver a painful sting to humans, causing nausea and vomiting
These tiny sea slugs float helplessly at the surface of the water – but when they find prey, they steal its venom and use it for themselves
Scientists sink cow 1,629m into South China Sea, then gigantic animal appears out of the gloom
The enormous deep-sea creature, which can grow up to seven metres in length, has never been filmed in this part of the world before.
10 prettiest sea animals in the world: Meet some of the most beautiful - and sparkliest - creatures in the ocean
Discover the most stunning and captivating sea creatures...
Drone captures Greenland ice tearing open to reveal humungous animal beneath
The colossal marine creature can be seen breaking through the ice to take several breaths of air before returning to the deep.
Wild killer whales filmed offering food to humans – here's what scientists think it means
Researchers found 34 instances of killer whales approaching humans with a range of food items, including dead fish and birds, stunned stingrays and incapacitated sharks.
"Raw and brutal": whale watchers look on astonished as orcas kill humpback whale in South Africa
Wildlife watchers saw the circle of life at its most brutal during South Africa’s sardine run when a pod of orcas killed a young humpback whale and ate its tongue.
"Feels like magic": the mind-bending videos helping scientists understand why corals bleach
The development of a new microscope is allowing experts to see what’s going on inside corals like never before – and it might help them understand bleaching.
Is this the world's weirdest ocean animal? Known as unicorns of the sea they're the size of shipping containers and have a tooth two-thirds the size of their body
Discover how narwhals got their name, what is unique about their tusks, where they live and more in our expert guide
At a staggering 33 metres long (that's 33 football goals) it's not only the biggest animal in the world today, it is the biggest animal to have ever lived...
Our guide to the world's largest ever creature, the blue whale
When this tiger shark bumped into a ray, something truly shocking happened
Scientists have observed electric rays delivering a shock to sharks to protect themselves.
Beaked whales are one of the strangest, rarest and deepest-diving marine mammals in the ocean - sometimes diving more than 2.5km down
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.
The "absolutely adorable” reason this octopus is hiding behind a twig
The curious octopus – filmed in Florida – appears to be playing hide-and-seek with a diver.
The very cute Dumbo octopus can swallow prey whole, reproduce at any time and is named after a Disney character – meet the elusive deep-sea animal
This animal's population is also unknown, as specimens are rarely found intact by scientists
This bizarre "giant swimming head" is about to return to Bali
Sunfish are on their way to Bali for the season and scuba divers are beyond excited.
"Largest great hammerhead ever filmed in the Bahamas"
A four-metre great hammerhead shark has been filmed up-close in the Bahamas.
Cute and very shy yellow boxfish filmed pootling around a reef – and it has a friend
An underwater photographer was surprised to see the two timid creatures hanging out calmly together.
Scientists capture first-ever footage of killer whales making seaweed grooming 'tools'
Killer whales have been filmed using kelp to scratch each other — a behaviour that has never been documented before.
Astounding deep-sea 'galaxy' filmed off Californian coast
This galaxy siphonophore is a stunning colonial organism that glows as red as burning embers.
'Moonwalking' orca stuns onlookers in Canada. Experts know what it's doing
Moonwalking is a rare behaviour among transient killer whales and may be a way of dividing up food to share.
“We’re not afraid of predators, we’re transfixed by them”: How Jaws changed our perception of sharks forever
Half a century after a great white shark terrified cinemagoers, we hunt down the lasting impacts of Spielberg’s blockbuster
'Eggs and sperm float around them like snow': this mating dance is like nothing you’ve seen before
When these marine animals get it on, they bust a dazzling move to impress their partner – and we have video evidence to prove it.
"Blows my mind”: when this drone pilot saw a baby whale off the coast of Australia, he wasn’t expecting it to do this
The photographer was amazed to see the newborn humpback whale launch itself into the air as it learnt to breach – and he caught the whole thing on camera.
A rare shark is seeking refuge in Miami's Biscayne Bay. Here's why scientists just spent 8 years tracking it
A new study reveals that Biscayne Bay is a vital year-round nursery and seasonal refuge for one of the world's most endangered – and unusual-looking – shark species.