根据材料内容，选择正确答案。
Do you know fish come out of eggs when they are born? After the little fish comes out of the egg, it eats the food in the egg. When it is big, it leaves the egg. It swims in the water. You can see the eyes and nose. Its ears are hidden in the head.
Spree fish eat other fish. Some fish have small mouths and teeth and they often eat plants.
