Scylla serrata

Scylla serrata is a type of crab. It is often called a mud crab or mangrove crab or black crab. It is found in Africa, Australasia and Asia. It lives in estuaries and mangroves.
Distribution.
"Scylla serrata" is found from South Africa to Sri Lanka to the Southeast Asian Archipelago. It is found from southern Japan to south-eastern Australia, northern New Zealand, and as far east as Fiji and Samoa. The species has also been introduced to Hawaii and Florida.