Video: Close-up of male seahorses laying 2,000 birds at once

Seahorses are special fish that are only 10 to 20 cm long, their heads are like horse heads so they are called "seahorses". This fish has a relatively long tail and can flex flexibly for jumping. The dorsal of the seahorse spread out like a brocade fan, often fluttering to maintain balance, keeping the posture of straight swimming, a beautiful action.

Seahorses are not only unique, but their reproductive behavior is also very special. When the breeding season arrives, the abdominal wall at the side of the body of the male seahorse produces wrinkles toward the middle, gradually forming a large "bag". The female seahorse lays eggs in the bag of the male seahorse (female seahorses do not have a baby bag), the total number of eggs can reach thousands. After the female lays the unfertilized egg into the male pocket, the outer shell of the egg breaks, the male sperm will surround the egg. After fertilization, the male is responsible for controlling the habitat of the embryo in the incubator bag. It will keep the blood circulating around the embryo, control the salt concentration in the incubator, supply oxygen and nutrients to the development of young offspring through a placental-like organ until birth.

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