A long and slender sea slug that grows up to 17 mm in length, with a long tapering posterior. The body is white with characteristic yellow/orange patches. The oral tentacles are long and streaked with orange pigment.
Emily Wilson 2007. Trapania maculata. A sea slug. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 26/01/2011]. Available from: