Argyrosomus japonicus is a silvery to bronze-green colored saltwater fish of the family Sciaenidae, which may grow up to 2 m (6 ft 7 in) in length and weigh up to 82 kg (181 lb). It is known as Dusky Kob, dusky salmon, salmon, Kob and kabeljou' in South Africa, Japanese meagre (FAO), mulloway or jewfish in the eastern states of Australia and South Australia, kingfish or river kingfish in Western Australia, Ô-nibe (大鮸, オオニベ) in Japan, and Sawwa Krokar Fish or Sawwa Machli in Pakistan. The name jewfish refers to its large otoliths, which are prized as "jewels" by some fishermen.

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