they use there claws to kill there prey or who ever threatens them
yes, to protect.
claws
Crabs have adapted to have armor to protect their body. Many species also have claws, in order to defend themselves.
Their hard shells help protect them from predators.
They are known to eat amphipods and have been observed hunting vent crabs.
to protect them from any other crabs or people stepping on them
They walk sideways to tell if the tide is coming They grow out of their shell to protect themselves from predators They have pincers to help catch their prey xx
to protect them
Hermit crabs protect themselves by the shells they live in. By living in shells they are able to hide in them, away from predators.
Its symbiotic though mostly for the crabs benefit - most anemones are sessile - that is fixed in place and get food from whatever comes by. A crab will actually take on in its claws and put it on its shell - even Hermit crabs will put one on their fake shells - this is to protect the crab. Anemones have stinging tentacles to protect themselves and with these crabs can protect themselves against predators, in particular Octopuses which would otherwise have the crab for a snack - its not just a one way relationship though - as the anemone is always around when crabs eat, they benefit from the messy eating habits, foods stuff float by and the anemone can eat them.
by having hard shell
the kiwa hirsuta is a male guardian to see in the maori mythology