---

GASTEROSTEIFORMES

Three-spined Stickleback is about 8cm full length. There are fresh water type to spend life in fresh water area and back-to-sea type coming in fresh water level only in the breeding season in this kind. For the hemorrhoids that are a spring place, it finish back-to-sea type after river going up in a brook or the waterway, and the fresh water type eats aquatic insects. A male makes waterweeds materials in the breeding season and makes a hideout in the concavity of the bottom and provokes a female by a courtship action to be called a zigzag dance and lets you lay eggs. A male protects the egg after the laying eggs. When other males invade one's territory with nervous temperament, the male at that time attacks it daringly.
Seahorse is about 9cm full length. The head bends to a ventral for a vertebra. The body is covered with the thing which changed of the scale. There are not the tail fin and the ventral. Seemingly it does not look like fish. It coil itself around seaweed with a tail. This the fish reproduction habits are famous. When it is early summer, the female lays eggs to a marsupium in the male abdomen and protects the male till an egg hatches. Child fish jumps out of the male abdomen when it greet incubation. When a male laid child fish before, it was misunderstood.

NEXT to Tree of Fishes to HomePage