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

It has subsequently been reported widely in Britain and Ireland where it is common from the lower shore to moderate depths.

[5] This goniodorid nudibranch is translucent white in colour, with spots of white and yellow.

Its mantle is reduced and shows its foot.

[7] Goniodoris nodosa feeds on bryozoans of the genus Alcyonidium, including Alcyonidium diaphanum, and, when fully grown, the tunicate Dendrodoa grossularia and Botryllus schlosseri, family Styelidae.