There are all kinds of horses in the world . But one of them you can’t ride. It doesn’t live on the land, but in the sea. Its head likes the head of a horse. So people call it “sea horse”. In fact, the sea horse is a small fish. It likes to lie in warm water . A sea horse always stands up in the water when it swims. Father sea horse carries the eggs to keep them safe in its pouch( 育儿袋 ) until they hatch ( 孵 ). When the eggs are hatched, the baby sea horses swim away.