Maximum length 3.4 m, body weight 400 kg.
A small robust shark-like whale having squarish or conical head with
underslung lower jaw. False gill mark on side of head set off by dark line
posteriorly. Body colour dark bluish-grey dorsally, lighter grey laterally
and white ventrally. Flippers long, up to 14% of body length, located just
behind the false gill. Dorsal fin low, strongly falcate, generally less than
5% of body length. Tail flukes with concave trailing edge and distinct
median notch. Teeth thin and sharply pointed, 12-16 pairs in lower jaw.