Melissa Hobson

This bedazzled arachnid woos its mate with a sexy thrusting dance.

This deep-sea polar worm looks like it can't decide if it's dressed for a glitzy party or a gruesome massacre.

Known for its uncanny resemblance to the TV character Shaun the Sheep, this adorable sea slug munches on algae to steal its ability to photosynthesize and become solar-powered.

Scientists hope the body of a pregnant great white shark killed on a drumline will reveal some of the mysteries of the species' reproduction.

This bright green sea creature contains a toxic pigment that protects it from predators, kills bacteria and determines the sex of larvae, turning males into a "living testacle."

A solitary dolphin in the Baltic Sea has been recorded talking to himself, leading researchers to wonder whether he's lonely and calling out for friends.

Deep-sea researchers have discovered a glowing sea slug with a huge hood that helps the creature feed like a Venus fly trap.

This critically endangered animal, known for its long, thin snout with a bulbous growth at the end, split off from other crocodilian species 40 million years ago.

A ghostly white angular roughshark found near Sazan Island, Albania, is the first example of leucism ever recorded in the species.

When Cassius — the world's largest captive crocodile — died in Australia, his keepers thought he could be over 120 years old. Now, a necropsy could reveal his true age.

Cassius, the world's largest captive crocodile, has died in Australia. The saltwater croc may have been over 120 years old — but no-one knows his true age for sure.

This living fossil can grow as large as an alligator, has two rows of needle-sharp teeth, and such strong armor that it survived predatory dinosaurs.

An eel inside the digestive tract of a dark sleeper fish before its escape attempt.

In mythology, giant oarfish are said to foreshadow earthquakes, although evidence shows this is not the case.

Orcas off the coasts of Spain and Portugal may be using boats as targets to practice hunting their favorite food, Atlantic bluefin tuna.

Rare fossilized sea cow unearthed by a local farmer in Venezuela appears to have been killed by a croc then eaten by a tiger shark.

This slimline, eel-like fish has no scales for protection so chooses to use a sea cucumber's sphincter for safety.

Amazing animals This bizarre animal lives on the seabed and uses its large hand-like fins to move walk around.

Records of orcas hunting sharks in the Gulf of California are on the rise, as experts say we may have underestimated how much this happens.

This eel-like fish lives on the seabed over 300 feet below the surface where it feasts on dead animals and protects itself from attack using a suffocating slime.

Despite numerous tests, experts still can't figure out why smalltooth sawfish in Florida are dying in such a strange way — spinning, thrashing and beaching themselves.

This curiously named sea-dweller lives along the Pacific coast, eats squid eggs and fights by opening its mouth wide.

Bizarre worm that looks "like the rump of a pig from one side and Mick Jagger's lips from the other" may be in the middle of an evolutionary leap, scientists say.

"Exceptionally preserved" fossils of an ancient shark that lived alongside the dinosaurs has finally revealed what the predator looked like — and why it may have gone extinct.

Juvenile bull shark numbers have significantly increased in Mobile Bay, Alabama, as waters warm — but swimmers don't need to worry, researchers say.