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Seahorses are small. They don't have legs or arms. They can't run. They don't live on the land, but live in the sea. Their heads look like the heads of horses. So people call them "seahorses". The seahorses are small fish. They like to live in the warm water. Father seahorses carry the eggs to keep them safe (确保……安全) in their pouches (育儿袋) until they hatch (孵出，出壳).