What is the difference between crabs and fiddler crabs? Why are the pincers of fiddler crabs big and small?
You know, the crab has two big pincers, and the crab's pincers are big and small. River crabs live in fresh water and prefer many water areas, such as lakes, rivers, creeks and so on, and sometimes climb ashore. The crab lives in the sea of 30~50 meters, they never on the coast, so their limbs gradually evolved into flippers for swimming in the sea. The fiddler crab love sandy areas, generally live in the beach and moist places, they dig their love, why the pliers and a small, because the crab usually can dig with a pair of pliers, and people are right-handed southpaws, on the market sell fiddler crabs have left large pincers also, having the right pliers large, because the habit gradually evolved, their pincers becomes a small.
Fiddler crabs are a species of crabs. Fiddler crab only male crab size, two claws, female crab two claws are small. Males vary in size and claws: large pincers are weapons used to fight, intimidate opponents, and attract female crabs; small pincers are tools for making food and prey.
