Crabs are decapod crustaceans, which means they have ten legs. They are found in all the world's oceans, as well as in freshwater habitats and on land. There are over 6,700 species of crabs, making them one of the most diverse groups of animals on Earth. Crabs are characterized by their hard exoskeleton, which is made of chitin. They also have two pairs of antennae, a pair of pincers, and a pair of chelipeds. The chelipeds are the crab's main weapons and are used for capturing food and fighting off predators. A minimal custom cursor with Minimal Crab.