what i now about crabs

  Crabs are decapod crustaceans which have a very short tail and are covered with a thick shell, or exoskeleton and are armed with a single pair of claws. There are over 6,793 species of crab spread across the oceans, fresh water, and even on land. ... Many Crabs live in the tropical regions. In the Habitat of water it is living in right now it is  salty, fresh or brackish water (mix of fresh and salty water). Besides aquatic species, some crabs are semi-terrestrial or terrestrial (they live on the land). They inhabit sandy areas with stones and rocks. What Zone they live in is a crab live only in the subtidal zones, which means that they live in a habitat that is continuously submerged in an estuary system.