Like most
of the beaked whales, we know very little about Gervais'
beaked whales. The best thing to look for when identifying
them is their prominent, narrow beak. Males can be identified
by a single pair of teeth that are located one-third
of the way from the tip of the beak to the corner of
the mouth, which are even noticeable when the mouth
is closed. The female does not have this tooth eruption.
Gervais' beaked whales have dark grey or marine blue
upper bodies whilst the pale grey under side is in sharp
contrast. In juveniles, the belly is white. There are
white blotches on the belly and the males have scars
on their skin.
