Maximum length 2.7 m.
Large black dolphin having bluntly pointed beak and pointed-tipped
flippers. Head triangular when viewed from above. Body overall black,
except whitish on lips, around genitals and anus; ventrally a light grey
patch present on chest between flippers. Dorsal fin tall, up to 30 cm, and
back-swept with rounded tip. Flippers very long and pointed distally. Flukes
with concave trailing edge, median notch and pointed at tips; Series of
21-24 small teeth in each side of lower jaw and 22-26 of upper jaw.