Description

Whales and dolphins are mammals, not fish. Scientists thing they are as smart as humans!
-Humpback whales communicate by singing songs
-A dolphin sleeps with only half its brain at a time
-The beluga is the only whale that can swim backwards
-The largest animal on earth, the blue whale, can’t swallow anything larger than a beach ball
-A sperm whale can hold its breath for more than two hours.