Why do groupers change from females to males when they reach a certain age?

Groupers are hermaphrodites, and as individuals grow, sexual transformations can occur, generally first female and then male, and it is not easy to distinguish between male and female before the gonads are immature. Spawning starts in March every year, and it has the characteristic of spawning multiple times.

The role of genes, the yellow eel is also a female eel when it is a child, and it is a male eel when it grows up.

<> grouper is divided into male and female. Most of the groupers are female precocious bridge-elephant monoecious fish, which are females at the time of sexual maturity for the first time, and after one to several years after participating in the reproduction as females, the females begin to sexually reverse to males, and there are also a small number of primary males that can be directly sensitized by juveniles to male fish.

Groupers are oviparous, and they are a type of oviparous fish. This means that they produce eggs to reproduce offspring, rather than viviparity like mammals. There are many different species of oviparous fish, and grouper is one of them.

As an oviparous fish, groupers reproduce by spawning to reproduce their offspring. During the breeding season, they usually look for a safe and comfortable environment to lay eggs in shallow sea caves or among rocks. The breeding season usually takes place at a specific time of the year to ensure the hatching of eggs and the survival of juveniles.

In addition to oviparous, some fish have other ways of reproduction. For example, some fish are viviparous, which means they give birth to their juveniles in their womb until they mature and can survive on their own. There are also fish that are bred by mouth, where they hatch eggs and protect the juveniles in their mouths until they are able to feed on their own and survive independently.

Overall, groupers are oviparous, and they reproduce quietly by spawning. This type of reproduction is very common in fish and is very suitable for their living environment and lifestyle in groupers. If you have more questions about how groupers breed and move their limbs, you can learn more about the breeding cycle, reproductive behavior, hatching, and breeding.

How groupers reproduce:

Groupers are hermaphroditic and have sex-transitioning characteristics. All females are sexually mature for the first time and then transition to males the following year, so there are significantly fewer males than females.

Salmon grouper is a type of spawning in batches. Oocytes with different phases in the same ovary. Even in the ovaries that have matured and spawned oviposites, there are more oocytes in the 3rd and 4th phases, and there are no signs of degeneration, indicating that the development of oocytes is asynchronous.

When the environmental conditions are suitable, the oocyte can still develop to maturity, and the eggs can mature and produce in batches during a reproductive cycle. The red grouper is a one-time spawning type, but during the reproductive season, the sexual maturity and reproduction of individuals are divided into sequences, with the first mature individuals reproducing early and the later maturing individuals reproducing later. However, it has been observed that the whole spawning cycle of the red grouper can last for 2 to 3 months, which is divided into three stages: the early, middle and late stages, each stage carries out continuous multiple spawning, and the middle stage is the peak spawning period, and the eggs laid account for more than half of the total number of eggs.

The total number of individual groupers varies from more than 71 million to 10 million for large species.

How is it possible, they are all hatched by fish eggs,