they support bymoving
\
claws
With their claws.
for defending themselves from prey
Crabs are not in the habit of attacking, but will defend themselves with a pair of slicing and crushing claws.
Hermit crabs pull themselves up into their hard shell. Other crabs must just get away as fast as they can.
Crabs spawn roe (which female crabs carry on themselves for a couple of month). But technically roe also can be called "eggs" )
They're the same thing.
Crabs have adapted to have armor to protect their body. Many species also have claws, in order to defend themselves.
Crabs and leeches have a parasitic relationship in their natural habitat. Leeches attach themselves to crabs and feed on their blood, which can weaken the crab and make it more vulnerable to predators.
Anemones attach themselves to the hermit crabs, to provide as a source of camouflage from its prey. They depend on hermit crabs to move about and to search for food
Their hard shells help protect them from predators.
they use there claws to kill there prey or who ever threatens them