Order Siluriformes Family Ariidae(sea catfishes). Giant catfish Netuma thalassina(Rüppell, 1837). Max length: 185cm TL. common length : 70.0 cm TL Synonym/Arius thalassinus Korean name/keun-ba-da-dong-ja-gae(큰바다동자개) Japanese name/Ousaka-hamagigi. D/spine 1, soft ray 7. A/spine 0, soft rays 17–21. Vertebrae/53-58.
Distribution; Indo-West Pacific/From southern Japan, Philippines Thailand to Australia and Indian ocean(Red Sea). Rarely in the Mekong delta. General; The giant catfish(Netuma thalassina), also known as the giant sea catfish, giant salmon catfish, giant marine-catfish, or the khagga. Head depressed, body compressed. Dorsal side of head sloped gently. With mammillary processes on dorsal surface. Eye located at the center side of head, inter orbital space broad and flat. 2 pairs of nostrils between mouth and eye. Mouth placed below the snout, snout with broad width. 3 pairs of long barbels around mouth. Palatine bone with villiform teeth. Dorsal fin with short base and with 1 spine at the front. Front margin of the spine serrated. Pectoral fin located near to bottom side and with 1 strong spine. Pelvic fin located at center of the body. A well develop adipose fin between dorsal and caudal fin. Blue dorsally, silvery grey ventrally. Dorsal and caudal fin yellowish red in color, adipose, anal, and pectoral fins dark.
A marine species often found in estuaries, but rarely enters freshwater. Reported to occasionally ascend into fresh water. Inhabit continental shelf within 100m depth. Feeds mainly on crabs, prawns, mantis shrimps(Squilla species) but also on fishes and mollusks. Incubates eggs in the mouth of male. The fry continue to take refuge in the mouths of the male fish for the first 2 months and once they leave, the males start to eat avidly and may consume their own young. An important food fish. Marketed mostly fresh; often dried.
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