How is a crab adapted to the life on the seashore?

Its pincers defend itself against other marine creatures, also its hardened shell enable it to become a natural born fighter against fish and monkeys. Yes not only do crabs live on the coast but they also live in the jungle near rivers.

Crabs are chiefly marine, but some are terrestrial for long periods. They are omnivorous; some are scavengers and others predators. Although they are capable of locomotion in all directions, crabs tend to move sideways; swimming crabs have the last pair of legs flattened to form paddles.