About This Fish


The cobia (Rachycentron canadum) is a ray finned marine fish which belongs to family Rachycentridae under Order Perciformes of Class Actinopterygii. It is also known as a black kingfish, black salmon, ling, lemon fish, crab eater, aruan tasek and Sergeant fish. It is found in warm-temperate to tropical waters of the West and East Atlantic, throughout the Caribbean and in the Indo-Pacific off India, Australia and Japan. It is a pelagic fish which occurs over mud, sand, coral reefs, wrecks, harbours, buoys and other structural oases and it also enters estuaries and mangroves for searching food. It is able to tolerate a wide range of temperatures and salinity which ranges from 1.6- 32.2°C and 5-44.5 ppt respectively.

The cobia is long and slim fish with a broad and flattened head. It has dark lateral stripe which extends through the eye to the tail and the body is covered with small scales while juvenile has conspicuous alternating black and white horizontal stripes. Eyes are small and the lower jaw is slightly larger than the upper jaw. Dorsal fin has 7-8 short but strong isolated spines with 31 soft rays while anal fin bears 2 spines and 24 soft rays. Caudal fin is lunate in adults with long upper lobe. Its food consists of crabs, squid and other small fish especially bottom dwelling fish such as flounder while the larva feed on plankton. It is preyed upon by dolphinfish and shortfin mako sharks. It is a pelagic spawner which spawns many buoyant eggs into the water during the period from April to September. Male reaches sexual maturity at two years while female at three years. It grows up to 200 cm in length and 68 kg in weight. It is a moderately long lived species which can live up to 15 years.

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