? 1. Appearance difference: Male fish is smaller, but the dorsal fin is longer, which can extend to the caudal fin, and the anal fin is more pointed, which looks like a triangle. The female is larger, with a shorter dorsal fin and a rounded anal fin.
2, disposition distinction: Male Mary fish disposition is more lively, especially in the estrus period, will continue to chase the female fish, until the completion of breeding. The female fish is relatively quiet and is the one who is chased when breeding.
Mary fish Mary fish can meet the requirements of breeding in 5-6 months. Before breeding, the anal fin of the male fish will change into a copulatory organ, and then keep chasing the female fish until the mating is successful. Mary fish are fertilized in vivo, so when the fertilized eggs mature, they will directly produce small fish larvae, which can swim as soon as they are born. Fish do not need to change water in the first week of birth, and a small amount of water can be changed after a week, but the temperature difference should not exceed 2 degrees.
Mary fish usually breed once every 4-6 weeks or so, and can breed 40-100 young fish each time. During the breeding period of Mary fish, we should pay attention to the number of water changes and the change of water quality. If the change is too big, it will easily lead to premature delivery of Mary fish.
