Yep, the name is a bit of a mouthful, but the "magnifica" part is quite appropriate. This little guy is a sea slug, a member of the nudibranch species, and he joined my fish tank on Friday. This Chromodoris Magnifica is about 2 inches long, with bright vibrant colors, and with bright orange gills and rhinophores. He's (ok, we don't know that he's a he, but "it" seems so impersonal) also surprisingly agile, and can slither around, but also just kind of lets go and allows the current drop him down somewhere else.