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Why do female swordtail fish undergo sex reversal?

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The so-called "sex reversal" of female fish refers to the gradual masculinization of some female fish that have given birth to fry: the body becomes slender, a sword-shaped protrusion grows below the caudal fin, the anal fin transforms into a rod-shaped gonopodium, and they begin to chase female fish, mate with them and fertilize them, and reproduce offspring. But it is only female fish turning into male fish; male-to-female reversal has not been observed. Regarding this issue, some people have recently raised different opinions: they believe that swordtail fish cannot undergo sex reversal, and their natural male-to-female ratio is always 1:2 to 1:1.5. Although the reproductive organs of swordtail fry begin

The so-called "sex reversal" of female fish refers to the gradual masculinization of some female fish that have given birth to fry: the body becomes slender, a sword-shaped protrusion grows below the caudal fin, the anal fin transforms into a rod-shaped gonopodium, and they begin to chase female fish, mate with them and fertilize them, and reproduce offspring. But it is only female fish turning into male fish; male-to-female reversal has not been observed.

Regarding this issue, some people have recently raised different opinions: they believe that swordtail fish cannot undergo sex reversal, and their natural male-to-female ratio is always 1:2 to 1:1.5. Although the reproductive organs of swordtail fry begin to develop when they reach 3 months of age, the sexual organs do not mature and stabilize until they are 7-8 months old. This issue can continue to be explored and studied in future practice.

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