Pseudoceros ferrugineus, the Fuchsia flatworm, is a marine flatworm species that belongs to the Pseudocerotidae familyPseudoceros ferrugineus can reach a length of about 18-48 mm. It has an enlarged oval shape. The upper surface of the body is fuchsia (hence the common name) with small white dots and two marginal bands red and orange without dots.This species is widespread in the tropical Indo-Pacific, from the Indonesian Archipelagos to Central Great Barrier Reef in Australia, Palau in Micronesia, Philippines and the islands of Hawaï.It can be found in the external slope or top coral reef, at a depth of 1-15 mThese flatworms are benthic and diurnal. Because of their aposematic colors, they have no fear to crawl around to feed. Pseudoceros ferrugineus feeds on various colonial ascidians.