The difference between male and female crabs is mainly in these aspects:

First,? Abdomen to distinguish male from female: the abdomen of male crab is triangular, while the abdomen of female crab is round or oval.

Second, the reproductive organs to distinguish between male and female: the reproductive organs of male crabs are located in their abdomen and consist of two large reproductive limbs and many small accessory organs. The female crab's reproductive organs are located in its chest and consist of a pair of ovaries and a pair of ovipositing organs.

Third,? Behaviors and habits to distinguish male from female: During the breeding season, male crabs will release a special smell to attract female crabs. Female crabs usually take the initiative to find male crabs to complete the breeding process.