Hippocampus is not a mammal, but an oviparous animal. May to August is the breeding season of hippocampus every year. In the meantime, mother hippocampus laid her eggs in the pouch of father hippocampus. After 50 to 60 days, the young fish will be born from the father's pouch.

Hippocampus belongs to the fish class in animal classification, mainly inhabiting tropical oceans, and it is a kind of fish that feeds on small crustaceans. Its head is like a horse, its tail is like a monkey, its eyes are like a chameleon, and its nose and body are like angular wood carvings. This is the shape of the hippocampus. A strange and precious fish, close to land and shallow sea.

Seahorses usually like to live in the slow current of coral reefs, because they are not good at swimming, so they often use their tails suitable for grasping to closely outline the branches of corals and the leaves of algae, and fix their bodies to avoid being washed away by rapids. Most species of seahorses grow at the junction of estuaries and the sea, so they can adapt to different concentrations of seawater and even survive in fresh water.