Trapania melaina is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.[1]
This species was first described from Sodwana Bay, South Africa.[2]
This goniodorid nudibranch is black in colour with a fine speckling of cream spots. The oral tentacles, lateral papillae, tail and rhinophores are tipped with orange and the gills are translucent with small yellow and black spots.
Trapania melaina probably feeds on Entoprocta which often grow on sponges and other living substrata.