The hippocampus is non-mammalian. It is a kind of fish. Although it is difficult to find out the characteristics of fish from the appearance, in fact, it also breathes with gills and depends on the movement of fins. It's just that its fins are different from those of other fish. It mainly relies on its dorsal fin to push forward. In addition, its tail is curly, which can be used to attach coral and other objects, thus preventing itself from being washed away by the current.

1. Reproduction time: The hippocampus often has regular reproduction time in the natural environment. Their reproduction begins in May and is accepted until August. The reason for this is that the temperature environment is different in different periods and the richness of food is different. Therefore, in order to better let the offspring grow, the hippocampus will choose to branch from May to August.

2. Mating and fertilization: Before hippocampus reproduction, the first thing to do is mating and fertilization. Unlike many fish, when seahorses mate, females inject eggs into the fertility sac of male seahorses, and then the male seahorses fertilize them. The fertilized eggs will stay here until they are formed, and then they will be born.

3. Giving birth to young fish: Hippocampus is the only animal on the earth that is born by males, but its fertility is different from that of mammals. Ascoma is mainly used to preserve fish eggs and does not provide nutrition for them, so hatching still depends on itself, and it will be discharged after hatching.