Hector's Dolphin

Hector's dolphin (scientific name cephalorhynchus hectori) is a subspecies of marine dolphin that inhabits the shallow waters of North Island's western shores. It is the smallest subspecies of marine dolphin, only growing 4 feet long and weighing up to 110 pounds. It is also the rarest subspecies of marine dolphin. Its dorsal fin is rounded, its body is short and stocky, and its face is covered with distinct black markings. It has on recognized species: Maui's dolphin.

Hector's dolphin is classified as an Endangered species. It is this close to becoming extinct for three reasons. The first reason is that it gets entangled in gill nets and trawl nets. Because of this, one of the World Wildlife Fund's (WWF's) efforts to save it consists of working to put an end to the use of gill nets and trawl nets in its habitat. The second reason is that its habitat is damaged by pollution. Because of this, another one of the WWF's efforts to save it consists of urging the Prime Minister of New Zealand to prevent further exploration for oil and gas in its habitat. The third reason is that its habitat is damaged by seabed mining. Because of this, yet another one of the WWF's efforts to save it consists of urging the Prime Minister of New Zealand to prevent further mining of its seabeds.

Source for picture and all information: https://www.worldwildlife.org/species/hector-s-dolphin