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

It has also been reported from the Andaman Sea[3] and Milne Bay, Papua New Guinea[4] which suggests a wide distribution in the central Indo-Pacific region.

[5] This goniodorid nudibranch is translucent yellow with a reticulate pattern of brown pigment on the body, rhinophores, gills, oral tentacles and lateral papillae.

The lateral papillae and the rhinophore clubs are unusually large in this species.

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