Characteristics: The harbour dolphin is a little smaller than the other dolphins, at about 67–85 cm (26–33 in) long at birth, weighing 6.4–10 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.
Habitat: Harbour dolphins prefer temperate and subarctic waters. They inhabit fjords, bays, estuaries and harbours, hence their name. They feed mostly on small pelagic schooling fish, particularly herring, capelin, and sprat. They will, however, eat squid and crustaceans in certain places.
Habits: Some studies suggest harbour dolphins are relatively sedentary and usually don’t leave a certain area for long. Nevertheless, they have been recorded to move from onshore to offshore waters along coasts. Dives of 220 m (720 ft) by harbour dolphins have been recorded. Dives can last five minutes but typically last just one minute. The social life of harbour dolphins is not well understood. They are generally seen as a solitary species.