Blue whales feed mainly on krill but also small fish and squid, that swim inside
their enormous mouths. The blue whale has thousands of extremely fine
teeth that allow water to filter out of the whales mouth, without the
whales catch escaping.Apparently just one breath from a fully grown adult blue whale, will
produce enough air to fill nearly 2,000 balloons!The blue whales heart is so big that it is around the same size as a small car, with the blue whales main arteries being big enough for a human to swim through comfortably!
