Dolphin facts
Every dolphin has its own signature whistle to distinguish it from other dolphins,
much like a human fingerprint
The gender differences between a male and female dolphin
are only noticeable close-up,
with the female having a mammary slit (for birth) on the underside.
Deep within a dolphin's body it's temperature is normally 35 degrees to 36.9 degrees, while it's outer body temperature is usually cooler.
In comparison, man's body temperature is 37.3 degrees
Dolphins usually live up to about twenty years, but have been known to live for about forty.
Dolphins sleep in a semi-alert state by resting one side of their brain at a time
Dolphins can help other sick or injured dolphins as often as they can, and they work as team if danger is nearby
A dolphin can hold its breath for 5 to 8 minutes at a time
Dolphins closest land relatives are thought to be cows, pigs and deer.
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