Trapania tora is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.

[2] This goniodorid nudibranch is black or dark grey in colour, with a pattern of white patches and thin white lines forming a network on the body.

The gills, papillae and rhinophores are translucent with white superficial pigment.

The oral tentacles have the body pattern at the base and white tips.

[3] Trapania tora feeds on Entoprocta which often grow on sponges and other living substrata.