Animals

From the opportunistic "have-a-go" approach of octopuses to "accessory males" that supply female anglerfish with a lifetime of sperm, author Jon Copley explores the sex lives of deep sea creatures.

Humpback whales may enjoy rolling around in seaweed as a form of play, but "kelping" could also help maintain their skin health by removing parasites and bacteria.

A new X-ray analysis of dinosaur feathers shows that their chemical structure is similar to that of modern bird feathers.

More orcas have died entangled in fishing gear in Alaska this year than in previous years, which may be linked to a "new behavior" where they feed in front of ascending fishing nets.

In the 1990s, a group of juvenile bull sharks were left stranded in a golf course pond in Australia, where they thrived for decades. Now scientists are trying to understand why.

Researchers tracked more than 200 bull sharks off the coast of New South Wales to find out exactly when they were most active and posed the greatest risk to humans.

Lampreys belong to an ancient group of fish called Agnatha that evolved 450 million years ago, predating both dinosaurs and trees.

A new study has found that the famous Australian lungfish Methuselah, who first arrived in the U.S. in 1938, could be up to 101 years old.

The seven-arm octopus, which actually has eight arms, is one of the largest octopus species and is rarely seen by people because it normally dwells in the deep sea.

Anglers in Texas reeled in a 283-pound alligator gar after a lengthy battle with the enormous fish. Experts say the catch likely breaks a 72-year record.