Northern right whale dolphin

Northern whale dolphin ( Lissodelphis borealis)

The Northern whale dolphin ( Lissodelphis borealis) is one of two species of the genus Lissodelphis within the Dolphins ( Delphinidae ). He is in the open sea of the North Pacific ( between 30 and 51 latitude) at home.

Features

The whale dolphin differs from all other species of dolphins by the complete absence of the fin. There are very slender, about two to three meters long dolphins. The weight is 60 to 100 kilograms. The body is black, only the tip of the lower jaw, the chest and a strip of this to the Fluke that widens around the navel, especially in males, and the majority of the Fluke underside are white. The muzzle is short and slender with a prominent lower jaw and is sold by a furrow from the slightly sloping forehead. The head is narrow. The flippers are small and slender. The Fluke is narrow with concave trailing edge and distinct notch in the middle. Calves at birth from 80 to 100 centimeters long and gray-brown or cream colored.

Behavior

The northern whale dolphin usually occurs in groups of five to 200 animals, which sometimes join together to form schools of up to 3,000 animals. The animals are skittish and avoid boats. During fast swimming or on the run, they often make long flat jumps. As a food serve fish and squid.

Evidence

• Mark Carwardine: whales and dolphins. Delius Klasing, Bielefeld 2008, ISBN 978-3-7688-2473-6, pp. 168-169.