Large sea cucumber ranging from 25 to 40cm in body length. Dorsal and lateral surfaces dark red, brown, or yellow. The body surface bears large, stiff, conical papillae or pseudospines. Papillae are usually paler in color than body surface and tipped with red. Tube feet are densely arranged on the ventral side and only three pairs of rows are distinct. The mouth is directed ventrally at the anterior end and is surrounded by tentacles. Length to 50 cm.