If your dream vacation involves fins and a splash, you're in for a treat. This lineup of snorkeling destinations covers ...

Two tiny sea creatures with translucent bodies found on the California coast are both new species. They’re sea slugs, part of ...

Discover how PADI, Blancpain, and dive centers worldwide are driving ocean conservation through Adopt the Blue™—one dive site at a time. Local actions, global impact.

And while they’re small — measuring less than a quarter of an inch — they can have an outsize impact, according to a researcher who studies them. “Nudibranchs,” or sea slugs ...