Like a turkey or a duck?
Armadillos and turtles have thick shells.
A hyena has a lovely thick kneck, as does a rhino.
Beavers and polar bears have thick fur.
Penguins
You mean Pachyderm, it is a thick skinned animal such as an elephant or hippopotamus
NO how thick are you a snail is a animal DUR
The thick layer of fat under a marine animal's skin is called blubber, and it keeps the animal warm, much like insulation in a house.
Reptiles
an animal whose skin is one inch thick
To stay warm in the cold winter.
polar bears and whales
polar bear