how big is a porpoise
Harbour porpoise skeleton on display. The harbour porpoise is a little smaller than the other porpoises, at about 67â85 cm (26â33 in) long at birth, weighing 6.4â10 kg. Adults of both sexes grow to 1.4 to 1.9 m (4.6 to 6.2 ft). The females are heavier, with a maximum weight of around 76 kg (168 lb) compared with the males' 61 kg (134 lb). The body is robust, and the animal is at its maximum girth just in front of its triangular dorsal fin. The beak is poorly demarcated.