Mud crab Scylla serrata farming has been going on for at least three decades in south China, especially in recent decade, but it has not reached even its optimum potential. The major constraint for further expansion of mud crab culture is the limited supply of crab ‘seed'. Mud crab culture still depends on wild-caught crablets, but its quantities are not sufficient to meet demand even at the current size of mud crab culture farming. There is a great need to develop a hatchery technology for the mass produ...