WhaleTimes®

YOU ARE CORRECT, SCIENTISTS BELIEVE THE DORSAL FIN IS IMPORTANT FOR THERMOREGULATION.

What does that mean? To thermoregulate means to control the body temperature.

(Think of the thermostat in your house.)

So, if a whale is too hot or cold, tiny blood vessels in the fin can either constrict (close) or dilate (open) to cool or warm the animal.

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