Adult length : 1.8-2.75 m; body weight about 100 kg.
A blunt-headed dolphin with a small dorsal fin. Body uniformly slaty grey
or slaty blue, slightly paler on the underside. Upper jaws bearing 34-40
teeth, while the lower ones 30-36 teeth. Dorsal fin small, sickle-shaped
with a rounded tip, located more on the rear half of the body. Flippers
broadly triangular. Juveniles weigh 3.8 to 6 kg at birth.