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A manatee has a thin layer of fat, because it eats primarily plants. It
is smaller than a whale. It has a small heart, and small lungs, therefore
it doesn't have much power to heat itself. It also lives in a warm
environment in Florida, so it isn't used to cold waters.
A whale has a heavy layer of fat, because it eats primarily small
animals. It is larger than a manatee. It has a large heart, and large
lungs, therefore it has lots of power to heat itself. It also lives in a
cold environment in the open ocean, so it is used to cold waters.
-Submitted by Sean Maguire
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