Black Pomfret Fish in Tamil is Karuppu Vavval. The body of the pomfret fish is very flat, with long and deeply forked tails. Black pomfret, also called ‘Halwa Fish’, contains proteins and omega-3 fatty acids. The steaks of Black pomfret are tasty and the fleshiest cuts from this fish. The size of the fish is larger and elongated, with a slender tail. Pomfret fish is very low in calories.