Three-lobed T-bar Nudibranch (orange)

Ceratosoma trilobatum is a species of colorful dorid nudibranch, a sea slug, a shell-less marine gastropod mollusk in the family Chromodorididae. Description It has a hard, almost rigid body with a long tapering foot and highly branched gills set between the three rounded triangular lobes of the mantle, one to each side ... Read more in Seabook