TheAsian seabass (Lates calcarifer) known as "Kaalangi" or"Narimeen" in Kerala is an important candidate finfish species forfarming. Seabass is a euryhaline fish, growing rapidly up to 3-5 kg within agrowing period of 2-3 years in both freshwater and brackishwater environments.For maturation and spawning it migrates to the sea while the postlarvae andjuveniles migrate to lagoons and backwaters for growing. It is a voraciouscarnivorous fish. However, the juveniles are omnivorous, feeding mainly on crustaceansand other small fishes. Seabass attains maturity at the age of 3-4 years at alength and weight range of 60 to 70 cm and 2.5 to 4.0 kg respectively. Malesare generally small and in the size range of 2.0-3.0 kg and the males convertinto females as they reach a size above 5.0 kg.