Mesoplodon grayi

Gray's beaked whale (Mesoplodon grayi), sometimes known as Haast's beaked whale, the Scamperdown whale, or the southern beaked whale, is one of the better-known members of the genus Mesoplodon. This species is fairly gregarious and strands relatively frequently for a beaked whale. In the Māori language, this species is called hakurā or iheihe. The species was first described in 1876 by Julius von Haast, director of the Canterbury Museum, Christchurch, New Zealand. He named it after the British taxonomist John Edward Gray, a zoologist at the British Museum. His description was based on three skulls he had received in May 1875 from a William Hood, Esq., who had retrieved them from three specimens that were part of a group of 28 individuals that had stranded on Waitangi Beach, Chatham Island, in the summer of 1874-75. Gray's beaked whale is a fairly slender member of the genus. The melon on the whale bulges towards the blowhole and slopes down towards the beak. The beak itself is very long and pointed for a beaked whale, and has a relatively straight mouth line. In both sexes, 17–22 small teeth per row located towards the back of the mouth have been reported, but not confirmed. In males, two small, triangular teeth are present halfway down the mouth. The overall coloration is dark on top and light below, and both sexes have a white beak. Females are lighter on top and have additional white markings near the genitals. Adult males often carry linear scars that probably result from fighting, and both males and females may display circular scars from cookiecutter shark bites. M. grayi are 5.5 to 6.0 m (18.0 to 19.7 ft) long and weigh around 1,100 kg (2,400 lb). They are believed to be around 2.4 m (7 ft 10 in) long when born.