? The medaka is oviparous and fertilized in vitro. When the medaka is breeding, the male fish will occupy the territory first, but other fish that are not in heat will expel the male fish, but the female fish that has been pregnant will come forward to mate, and will lay eggs after about 2-3 days of successful mating. The female fish lays about 10-20 eggs each time, and the number of eggs laid is closely related to the size of the female fish. It takes 8-14 days
for fertilized eggs to hatch, and the speed of hatching is closely related to water temperature. After the eggs are fertilized, the breeder needs to transfer the parent fish to other containers immediately, otherwise they will eat the eggs as food. Medaka have a strong ability to reproduce, as long as the environment is comfortable, they can reproduce all year round.
should be prepared for the breeding of medaka? When the breeding of medaka, the breeder needs to place aquatic plants in the container, so that the fish eggs can be attached, and the fish eggs can be well hidden and not eaten by the parent fish. If there are no aquatic plants, small stones can be laid at the bottom of the tank to prevent the parent fish from eating the eggs. If breeders want to hatch artificially, they need to prepare gauze and separate containers that can be sealed. After fertilization, they can put them on wet gauze, which can speed up the hatching of fish eggs and improve the hatching probability.
