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, ...

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

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 ...

Heat-trapping methane may be best known for the dangers it poses to humans and Earth’s atmosphere, but in the dark depths of ...

This week’s beachcombing survey brought in a fresh batch of sargassum washed ashore — and with it, some of the ocean’s most elusive hitchhikers: sargassum shrimp. These tiny crustaceans, often ...

Octopuses have a few characteristics that make them stand out as one of the most intelligent mollusks in the ocean. These ...

Bountiful remains of foraminifera reveal how organisms responded to climate disturbances of the past. They can help predict the future, too.

Two 325-million-year-old ctenacanth shark fossils discovered in Mammoth Cave shed light on ancient marine ecosystems.

Sticking out of the wood and flowing in the water were two “unusual,” feather-like creatures attached to the rotting material ...