Wikipedia
Chromodoris
Chromodoris is a genus of very colourful sea slugs or dorid nudibranchs, marine gastropod molluscs in the family Chromodorididae. A molecular phylogeny of the family Chromodorididae resulted in this genus being restricted to a smaller number of species than formerly, most of which have longitudinal black lines on the mantle. Many former members of Chromodoris were transferred to Goniobranchus.