Sea Slugs

Sea Slugs

Sea slug is a common name which is applied to some marine invertebrates or marine gastropod mollusks, that over time have lost their shells, or have a greatly reduced shell or an internal shell. Nudibranchs are a large group of marine gastropods which have no shell at all, and although most are not large, they are often very eye-catching because so many species have brilliant colours.

Credit: Wikipedia