Bursatella leachii, the ragged sea hare, is a medium- to large-sized benthic opisthobranch mollusc within the Order Anaspide, the sea hares. The body is variably colored, grayish-green to white-tan with dark brown blotches and spots, compact and rounded, with distinct head and neck regions evident. The body is also covered with numerous long, branching fleshy papillae that give the animal its ragged appearance. The gill is covered by a pair of fleshy parapodia. Two long, retractile olfactory tentacles called rhinophores occur on the head, and also two fleshy enrolled oral tentacles occur at each side of the mouth. Adults completely lack a shell (Voss 1980, Kaplan 1988, Rupert and Fox 1988).