Many animals that live in water need to come up to the surface to breathe, but they can still spend impressive lengths of ...

Biology professor Shana Goffredi calls these new curious creatures “extremely adorable” — although arachnophobes may disagree ...

The well-known Portuguese man o’ war — Physalia physalis — may look like a jellyfish, but it’s actually a siphonophore, or a colony of animals that live together to create the complete structure, ...

A "strange" creature recorded in the deep waters off the coast of Japan represents an exceptionally rare kind of discovery.

Scientists say they have discovered three previously unknown, unnamed species of sea spider off the U.S. West Coast that could be teaming up with bacteria to thrive off gas bubbling from the seafloor ...

Hycean worlds are also called ocean worlds. They're planets covered in oceans that also have thick hydrogen atmospheres.

Sharks, rays, octopus and penguins are among more than 330 species killed by the mass algal bloom washing across South ...

Attracted by bait, sea turtles off the coast of southern Peru often get caught on fishing hooks intended for mahi-mahi.

Boaters off the coast of California got the chance to see the biggest animal on Earth and the group is calling it a “once in ...

Imagine traveling more than 600 miles from the only home you’ve ever known, to a mountain ridge you’ve never been to. It’s ...

Climate change will benefit basking sharks in the UK but creatures like the longest living animal may struggle.