Australian scientists have discovered an octopus in Indonesia that collects coconut shells for shelter — unusually sophisticated behavior that the researchers believe is the first evidence of tool use ...

A video taken during a dive in Lembeh Strait, Indonesia, shows an aggressive coconut octopus walking across the ocean floor with the bivalve shell it uses for protection and lurching at the person ...

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 colors ...

At the end of the semester in the advanced invertebrate zoology course I took, my rather dry, boring professor made the only joke I remember him ever uttering. We had just finished the phylum ...

As the tide went out, the sea receded, leaving behind a shallow tide pool where an octopus was stranded. Australian photographer Gaetano Gargiulo gently placed his camera next to it, and the octopus ...

The summer months bring low morning tides along the California coast, providing an opportunity to see one of the state’s most unusual inhabitants, sea slugs. Also called nudibranchs, many of these ...

Contorting, shape-shifting, camouflaging—often all at once—octopuses are as diverse as they are fascinating. Here six octopuses show their stuff. You’re sitting on the seabed, just off the coast of ...

Scientists are studying how the argonaut octopus evolved the ability to produce a floating shell-like structure to care for its offspring. By Sofia Quaglia Argonauta Argo is not a typical octopus.

The Bailey-Matthews National Shell Museum and Aquarium on Sanibel Island has a new exhibit ready for you to enjoy. It's called "Brilliant Colors of the Sea: Nudibranchs and Their Relatives." ...