Description
Reaching a maximum length of about 4.2 meters (1.9 m when born), and with an estimated weight of about 1 tonne (1.032 tons), Hector's is one the smallest of the beaked whales. It is known from only a few stranded animals and a single confirmed sighting of a juvenile off Western Australia. Hector's beaked whales are dark greyish-brown dorsally, paler ventrally. A single adult male specimen had a white beak and white on the anterior portion of the head, with white, linear scars criss-crossing its body, while the juvenile seen off Western Australia had a mask covering its eyes and extending unto its melon and upper beak. The melon, which is not very prominent, slopes quite steeply to the short beak. Adult males have a pair of flattened, triangular teeth near the tip of the lower jaw. As with most other beaked whales, the teeth do not erupt in females. The dorsal fin is triangular to slightly hooked, small, and rounded at the tip. The leading edge of the dorsal fin joins the body at a sharp angle.
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