Most whales are known to measure over 20 meters and grow over 30 metres. It seems so interesting that a whale is no longer a fish, its mother’s milk feeds its milk to the baby calf. The largest animal in the happens to live under the green sea. Here’s a fact about whales, did you know that A humpback whale has a tail longer than any other whale in the sea, it also has a diet and one of them are krill fish and small fish. The whale weighs as 250 tongues which is heavy like a big barge.