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They need them to fight

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Q: Why do the male crab have bigger claws then the female crab?
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How do you tell if a fiddler crab is a boy or girl?

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.


How can you tell the sex of a watermelon crab?

just like any other crab the male is the one with the big claw.. and the female has two smaller claws


Do female hermit crabs have one claw and male hermit crab have two claws?

No, they both have two claws. One large one and one small one.


How can you tell apart from a female crab and a male one and can you show pictures?

If you tip your hermit crab almost upside down, they will come out of their shell a little bit. If the hermit crab is a female, then they will have two little dots on each side of their insides, used for laying the eggs of the hermit crabs. If it is a male you will not find these dots.


Are female crayfish larger than male ones?

Yes,the father of any animal is always bigger than the mother.


Are female's claws different from males?

are claws of a female different from the male


How do you identify whether the turtle is male or female?

The male has a flat stomach and the female has a stomach that pockes out so she has enough room in here for thee eggs,males have bigger claws and tails than the female,the female will also grow bigger than the males.


Can you tell a girl hermit crab from a boy by its claws?

No, but here's a page with pictures of male and female crabs and how to sex them. http://www.thecrabbagepatch.com/crabanatomy.html


How do you tell male or female with their claws if they are a purple pincher hermit crab species?

You cannot tell the gender from their claws or color. You must look for the presence of "gonopores" at the base of the last pair of walking legs. Gonopores will be on the female crab they look like two small dots. Look up "hermit crab gonopores" for a photo reference.


Does the female crab lay the eggs or does the male lay eggs?

The female crab lays the eggs, and not the male.


How do the male fiddler crab protect himself from predators?

claws


How do you tell your turtles gender?

Well, mostly you can tell when they are a bit over one year, mostly its their tail the male has a bigger tail then the female. also the male has bigger foot claws!