Size to 7 cm. Shades of light purple with thin white edge around mantle and foot. Base of rhinophores and gill stalk deep purple with yellowish orange above. There are several color variants of this nudibranch.
East Reef Wreck, Lankayan, Sabah.
''Hypselodoris bullockii'' is a species of colorful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
''Hypselodoris bullockii'' is quite variable in color. ''Hypselodoris apolegma'', which looks similar to this species , and was assumed to be possibly a different color form of ''H. bullockii''. However, recent phylogenetic data confirm the distinction of the two species, and suggest a sister species relationship between them.