Brachyura
Ocean crabs are a diverse group of marine crustaceans that belong to the order Decapoda. They have a hard exoskeleton and five pairs of legs and range in size from small to large. Ocean crabs can be found in a variety of colors and habitats and are omnivorous, feeding on a variety of foods including plants, algae, and small invertebrates. They are social animals and use their claws and legs for defense and capturing food. There are thousands of known species of ocean crabs, including those in the families Grapsidae, Majidae, Portunidae, and Xanthidae.
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