The body is mottled grey, white background with tiny black spots, a thin black margin and wider orange margin crossed with white bars. On the middle of the body there are usually a light orange stripe along the length. The body underside is white with a wide orange and thin black margin.This flatworm has a pair of erect pseudotentacles.
Pseudobiceros damawan can be found under rock,in reefs, lagoons,at the reef crest under rubble. This flatworm feeds on colonial ascidians.
The name "damawan" refer to the reef where the flatworm was collected Madang, Papua New Guinea .