Crabs are decapods in the brachyuran infra order. The family comprises more than 14,750 species known for their ten legged creature (decapod). They are physiologically and structurally diverse across marine and freshwater environment. Their importance are diverse, this type of decapods are used as biological models and are highly edible for consumptions. Crabs have flourish to be a predominant icon in the invertebrate fauna because of their ubiquitous in some part of the world including marine, freshwater and terrestrial environment. The crab fisheries are also predominant in the marine, coastal, freshwater and lagoon fishery. Crabs are known as ecosystem engineers due to their ability to burrow into sediment structures.