Read the text. Choose the right words and write them on the lines. Blue whales

Example: Some blue whales are longer than three buses! 1. They are the largest animals in the world. They eat the very smallest animals that live in the sea and fish eggs, too. 2. Blue whales live in cold seas most the year because they can find more food there. But when there is ice on the water, whales swim to another part of the world. 3. There, they they swim back again! When there is no ice. 4. Blue whales don't have teeth. They have a kind of moustache inside mouths which catches the food when they swim.