main pattern of this species is dark above, light
below, with a tendency for the dorsal fin to darken
considerably in adults. In the young the belly is
cream which darkens to a blue-grey hide. There is
an eye patch which is also dark, with females alone
developing both white upper and lower jaws and scars.
The lower jaw is arched in the same fashion as the
Right Whales', with a prominent tooth erupting at
the peak of this arch in males. The maximum recorded
lengths have been 4.7 m in both males and female (Ward
The male Blainville's Beaked Whale is one of the
oddest-looking of all cetaceans. It has a pair of
massive teeth that grow from substantial bulges in
its lower jaw, like a couple of horns; these may be
so encrusted with barnacles that the animal appears
to have 2 dark-coloured pompons on top of its head.
This feature makes it relatively easy to identify
at sea, although it is generally inconspicuous and
difficult to find; it is known mainly from strandings.
The flattened forehead and large spots all over its
body, possibly made by the teeth of Cookie-cutter
Sharks and parasites, are also characteristic.