Sperm whales were feared for their jaw filled with
huge strong teeth and right whales were feared for their tails which
they could use to smash a small whaling boat to pieces.
Sperm whales use their jaw from what seems an unusual
upside-down position, but by doing this they are better able to reach
their target as the large top side of their head would mean that it
would be difficult to lift themselves out of the water for a bite. Sperm
whales only have teeth in the lower jaw, the upper jaw has sockets to
receive the teeth when the mouth is closed.
An engraving from
"The cruise of the Cachalot"