Rostrum slender and pointed. Coloration dark gray to black dorsally and somewhat lighter ventrally.
Males have a single large tooth at the midpoint of each side of the mandible.
This tooth may be up to 20 cm in total length and is imbedded in a large hump of supporting bone that gives a high, arching contour to the lower jaw. Females do not have so prominent a tooth and crested jaw. Distribution in Texas. These whales are uncommon residents of warm waters worldwide. In the western North Atlantic they are rare but occur from Nova Scotia to Florida and the Gulf of Mexico.