Goniobranchus fidelis
Goniobranchus fidelis, also commonly known as the faithful sea slug, is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Description
Goniobranchus fidelis can reach more than in length. The foot of the animal is cream in color; it is elongate and is almost covered by the edges of the wide mantle. The more central part of the mantle has a creamy-white area with scalloped edges, whereas the entire wide margin of the mantle is orange or red. Where the two differently coloured areas meet, there is a burgundy-colored border which varies in width from one animal to the other.The rhinophores are laminated, contractile and greyish in color with lighter colour at the tip. The shade of grey varies from one individual to another.
The gills are the same colour as the rhinophores and they are retractable.
Distribution and habitat
This species was described from Sri Lanka, Indian Ocean. The distribution of Goniobranchus fidelis includes the tropical Indo-West Pacific and Red Sea.Its habitat is the external reef area as well on the top or on the slope up to deep with a preference for dead corals.