Glaucus [Glaucus]

Description

Glaucus is a small, striking nudibranch often seen drifting at the surface or just below it, sometimes riding waves like a tiny sail. Divers may spot it on the underside of the water column, where its flattened body and vivid blue-gray tones help it blend in. When encountered, it’s a memorable “floating” sight with dramatic coloration.

Species

Atlantic Sea Swallow

Glaucus atlanticus

Taxonomy