Cephalorhynchus hectori. Photograph by James Shook, who retains copyright and releases the image under the license shown below. Originnale uploaden to English Wiki by JShook https://en.wikipedia.org/wiki/User:JShook

Source: https://commons.wikimedia.org/wiki/File:Hectors_Dolphin.jpg

Hector's dolphin (Cephalorhynchus hectori) is the best-known of the four dolphins in the genus Cephalorhynchus and is the only endemic cetacean to New Zealand. At approximately 1.4 m in length, it is one of the smallest cetaceans.