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

It is widespread in the Indo-Pacific region with records from the African coast (Tanzania, Kenya) through the Maldives, Indonesia and Western Australia to Fiji.

[3] This goniodorid nudibranch is translucent white, with a pattern of large dark brown or black spots with smooth edges on the body.

The gills, papillae, oral tentacles and rhinophores are dark brown or black.

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