put it on it's back look at it's belly is it have's a triangle it is a boy if it has a circle it is a girl.
A Boy Fiddler Crab has 1 big claw and 1 small. A Girl Fiddler Crab has 2 small claws.
how you tell if a fiddler crab is a boy or girl is the male 1s have 1 large claw an 1 small claw an the female ones have 2 small claws
The male has a ball claw and the female does not.
You can tell a fiddler crab's gender by its claws. A female fiddler crab has two claws, the same size. A male fiddler crab has one large claw and one small claw.
The claw size has nothing to do with the sex of the hermit crab. The small claw is a "feeder" claw, used to rip and tear food and bring it to the crab's mouth. The large claw is used for defense, as well as for holding the food while the crab uses the small claw to pick pieces off to eat. The female crab will have two visible gonopores on the 4th pair of walking legs, and will have pleopods on the side of her abdomen, best seen when the crab is switching shells.
you could tell by the color of its big claw or behind its feet is two holes it is a girl
look at him
girl
They get visited by a stork.
Under their back legs there are dots. If there are dots its a girl if there aren't its a boy.
See if there is a hole or dot under there body and if it does it’s a girl
No, but you can tell the difference between a boy and a girl hermit crab.The female land hermit crab has tiny genital openings called gonopores. The gonopores are located on the first segment of the back pair of walking legs. They are close in to the body, near the joint of the cephalothorax and abdomen. The gonopores are the openings into which the male crab places his spermatophore during mating. The male crab, gently tapping and rocking the female crab, encourages her to come out of her shell. The crabs mate in a position where the female's gonopores line up with male's fifth pair of legs. The male gently places his spermatophore into the female's gonopores. Since females of both species of land hermit crab sold in the United States (purple claw and Ecuadorian) have gonopores in the same place and of the same size, it is probably safe to say that all the females of the species kept in captivity (including Australian species) have their gonopores similarly situated. Many crabs are reluctant to come far enough out of their shells to allow you to see whether or not they have gonopores -- DO NOT FORCE THEM!! To have a better chance of seeing them, try looking for them after or during your pets' weekly bath. I have found most of my crabs are willing to come out far enough, but not all of them. Do not under any circumstances attempt to pull a crab from its shell to see the gonopores. The crab will sooner allow itself to be torn apart than be forcibly removed from its protective shell house.