The Giant Trevally (Caranx ignobilis), also known as the lowly trevally, barrier trevally, ronin jack, giant kingfish, or ulua, is a species of large marine fish classified in the jack family Carangidae. The Giant Trevally is distributed throughout the tropical waters of the Indo-Pacific region, with a range stretching from South Africa in the west to Hawaii in the east, including Japan in the north and Australia in the south.