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

This goniodorid nudibranch has a complicated colour pattern.

The body is a mosaic of brown patches which contain white spots, interspersed with orange.

The rhinophores, lateral papillae and gills are cream with brown patches.

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