Aside from the strongly-build tails and massive heads equipping with callosities, the sheer size of this animal is its best defense, although young calves are the most vulnerable to orca and shark attacks.
42.
The pointed columella is arcuated, covered by the inner lip, which conceals, by its expansion, a part of the body of the shell, and forms a large, white, and polished callosity.
43.
The coloring and shape of the pygmy right whale, dark gray dorsally and lighter gray ventrally, commonly with a pair of chevron-shaped lighter patches behind the eyes, is similar to that of the callosities.
44.
A decurrent band of a rose color is seen beneath the suture, and three others surround the middle of the lowest columella edge is covered by a pretty thick callosity, spreading a little upon the belly of the shell.
45.
A "'callus "'( or "'callosity "') is a toughened area of skin which has become relatively thick and hard in response to repeated friction, pressure, or other irritation.
46.
As in other species of right whales, the callosities appear on its head immediately behind the blowholes, along the rostrum to the tip, which often has a large callosity, referred to by whalers as the " bonnet ".
47.
As in other species of right whales, the callosities appear on its head immediately behind the blowholes, along the rostrum to the tip, which often has a large callosity, referred to by whalers as the " bonnet ".
48.
The columella is arcuated, covered by the inner lip which extends upon the body of the body whorl in a white, rather thick callosity, loaded towards the base with some slightly apparent guttules, and terminated by small spinous points.
49.
The inner lip is inconspicuous, applied, smooth, with a callosity at its junction with the outer lip . The sculpture of the first two whorls is closely, regularly, validly, axially costulate, the rest rudely ribbed in the anterior two-thirds.
50.
Baboons do not have nests or dens but spend the night perched in trees on their callosities, built-in baboon Barcaloungers, which Sapolsky describes as " gun-metal grey calluses on their rear ends that allow them to fall asleep sitting up on a branch without their tushes falling asleep ."
