Has a black head and fluke, a white throat and body and a long dorsal fin that starts straight end ends in a curve.
They are very active and are known to do many tricks in the water.
Coastal waters off the coast of southern Argentina, around the Malvinas/Falkland Islands, off the south coast of Chile, and around the Kerguelen Islands in the southern Indian Ocean.
There is no documented observation of predation; may include killer whales, sharks and leopard seals.
Little is known about the migratory patterns of these dolphins, however fishermen report that they disappear from their common areas during the winter. They may follow fish that migrate offshore in winter. The dolphin population in the Strait of Magellan decreases in late autumn. In the Kerguélen population, the majority of dolphins migrate out of the Golfe du Morbihan between June-December.
Social system/Group size
They are highly social and are usually seen in groups up to 10. For feeding and breeding groups up to 100 gather; often together with Burmeister's porpoise, Peale's and Chilean dolphin.
Entanglement in fishing gear and pollution are the major threats, but underwater noise (eg. from naval operations) is known to cause stress and might be a reason for strandings.
Several studies on the abundance, biology, reproduction, migration and behavior are conducted.
They are known to swim upside down in order to catch prey because they are not as visible.