Mud Crab

Scylla serrata (often called Mud Crab or Mangrove Crab or Black Crab), is an ecologically important species of crab found in the Indo-Pacific. It is found from South Africa, around the coast of the Indian Ocean, where it is especially abundant in Sri Lanka.
In their most common forms, their shell colours vary from a deep mottled green to very dark brown or sometimes black with legs that may be marbled. They have small irregular white spots on the carapace and swimming legs.
As these crabs are known for their robust size and dense meat content, they have been greatly sought after, over the years.
The Mud crab is a species of crab which is found in Sri Lanka as well and is an economically very important crab species.
It is mainly used for food. It is very popular as food, throughout its range and also globally. Further, it also has a very high flesh content, rapid growth rates and they also have a high tolerance to both nitrate and ammonia.
Hard-shells Mud crabs are generally marketed alive. But the soft-shell crabs are marketed frozen. It is probably the most common crab species in many markets of Southeast Asia and particularly Sri Lanka.