The giant catfish (Netuma thalassina), also known as the giant sea catfish, giant salmon catfish, giant marine-catfish, or the khagga,Common names of Netuma thalassina at www.fishbase.org. is a species of catfish in the family Ariidae. It was described by Eduard Rüppell in 1837, originally under the genus Bagrus. It inhabits estuaries and occasionally freshwater bodies, in Japan, Australia, Polynesia, southern Vietnam in the Mekong Delta, the Red Sea and the northwestern Indian Ocean. It dwells at a depth range of . It reaches a maximum total length of , but usually reaches a TL of .
The diet of the giant catfish includes crustaceans such as crabs, shrimp, prawns and stomatopods; worms, finfish, cephalopods, sea cucumbers, and mollusks.Food items reported for Netuma thalassina at www.fishbase.org.Food and Feeding Habits Summary Netuma thalassina, 1 at www.fishbase.org.Food and Feeding Habits Summary Netuma thalassina, 2 at www.fishbase.org. It spawns between April and August.Spawning for Netuma thalassina at www.fishbase.org.
The giant catfish is harvested commercially and recreationally.
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