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Maximum length males 5.4 m, females 4.0 m.
A robust black dolphin with thick and bulbous head. Dorsal fin located in anterior half of body. Flippers long and sickle-shaped. Tail flukes broad with deep median notch. Body black with pronounced white ‘saddle’ on dorsal surface behind dorsal fin; ventral with short white area from chin to upper breast, usually not beyond the level of dorsal fin. Only 7-9 peg-like teeth present in each side of both jaws.