The crab is one of the animals that we are familiar with and can often see.They are crustaceans in terms of species, and their reproductive mode is the same as that of most crustaceans, which is oviparous, not viviparous.Generally speaking, the reproductive mode of mammals is viviparity.Crabs can be distinguished from mammals by their reproductive characteristics.
Crabs can produce more eggs each time they breed, sometimes even millions of eggs.These eggs will be hatched in the female crab's body, and then will be separated from the mother.These larvae will flow with the direction of the current, and then go through the process of shell extraction.After exuviating several times, the larva can develop into a megalopa.At this stage, the crab will go through several times of shell extraction process, and then develop into young crabs.Young crabs will also withdraw their shells in the process of later development, and eventually they will develop into adult crabs.
Crabs lay eggs after the gonads mature, generally speaking, they have the ability to lay eggs in about 18 months.Generally speaking, crabs can only lay eggs once a year.Although they can only reproduce once a year, the number of eggs they can produce is relatively large, sometimes up to millions.Of course, these eggs may not be able to develop into the final crab, but there are still more successful development.Of course, some crabs can only reproduce once a few years, because the environment around them can not stimulate their gonads to ovulate, which is also relatively common.
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