Mesoplodon ginkgodens 

Both of the genders reach 4.9 meters (16 feet) in length. They are around 2.4 meters long (8 feet) when born.

Ginkgo-toothed whales are found in the tropical and warm temperate waters of the Indo-Pacific. Like other species in the genus, ginkgo-toothed beaked whales are thought to occur primarily in deep, offshore waters.

Ginkgo-toothed Beaked Whales are more robust than most mesoplodonts, but otherwise look fairly typical. Halfway through the jaw, there is a sharp curve up where the ginko leaf shaped tooth is. Unlike other species such as Blainville's Beaked Whale and Andrews' Beaked Whale, the teeth do not arch over the rostrum. The beak itself is of a moderately long length. The coloration is overall dark gray on males with light patches on the front half of the beak and around the head, and also have small white spots on the bottom of the tail, but the location may be variable. Females are a lighter gray and have countershading.

These whales are presumed to be primarily squid eaters but may also take some fish.

RALF KIEFNER, WHALES & DOLPHINS CETACEAN WORLD GUIDE, PUBLISHED BY IKAN, Page: 280

http://en.wikipedia.org/wiki/Mesoplodon_ginkgodens
http://www.iucnredlist.org/details/13246