Sea slugs are one of the world’s most stunning, diverse, and adaptable animals. Not only are sea slugs beautiful to look at, ...

A deep-sea expedition to one of Earth's most remote island chains has surfaced stunning pictures of the vibrant ecosystems surrounding hydrothermal vents that scientists didn't even know were there.

A renowned marine biologist claims to have made a spectacular discovery off the coast of Mallorca: She reports having seen the rare sea slug Glaucus atlanticus. This would be the first sighting in ...

The Bailey-Matthews National Shell Museum's new exhibit, "Brilliant Colors of the Sea," features photographs of nudibranchs. Nudibranchs are shell-less marine mollusks known for their vibrant ...