>>11618381Some species the male crabs have asymmetrical pincers while females have symmetrical. This is usually a sign of the male crabs health and ability to provide for the female crab. Funny enough the species of crabs with symmetrical claws can usually change gender and are not as aggressive, meanwhile you have these small dudes know as fiddler crabs that will do their equivalent of flipping you off to then try and fight you.
