data is scant for almost all species on account of
the fact that mesoplodons all live far out to sea.
For instance it is not known whether females are larger
than males. From beached individuals we know that
the whales are small, ranged from 4-6m in length and
are typically about one 1000-1500kg in weight.
Species typically have a small triangular dorsal
fin A dorsal fin is a fin located on the backs of
fishes, whales, dolphins and porpoises. Its main purpose
is to stabilise the animal against rolling and assist
in suddent turns. Some animals have developed dorsal
fins with protective functions, such as spines or
venom. Many catfish can lock the leading ray of the
dorsal fin in an extended position to discourage predation
or to wedge themselves into a crevice.
Virtually nothing is known about mesoplodon behaviour
as so few have been seen alive. Further their range
of behaviours at the surface appears limited to slow
swimming. There is usually no surface blow and there
have been no reports of a mesoplodon fluking (raising
their tail fluke clear of the water on diving).
Longeveity, lactation and gestation data is non-existent.