Dusky Kob

Argyrosomus japonicus

The dusky kob is found in the Indo-West Pacific, from southeast Africa to India, Japan and Australia. Its wide range means that it is known by a number of different names – including jewfish (in Australia), and Japanese meagre. Dusky kob can reach up to 180 centimetres

Dusky Kob

in length, while the weight record is 75 kilograms. They are elongated in shape, and silvery grey in colour. Underwater, the dorsal surface may give off a bluish sheen, while the head often appears coppery. Dusky kob can be easily identified from other kob species by a row of small white spots along the lateral line. Adults favour inshore reefs, while juveniles are found in the surf zone. At around 30 centimetres, juvenile kob migrate into estuaries to feed, only returning to the ocean upon reaching maturity.

Squaretail Kob

Argyrosomus thorpei

Squaretail kob are native to the Western Indian Ocean, and are found from Mozambique to Port Elizabeth in South Africa. Specimens have also been reported on the west coast of Madagascar. This species reaches up to 70 centimetres in length, although an

average of 40 centimetres is more common. They are silver in colour, with distinctive orange or yellow-tinged fins. Squaretail kob spawn during the cooler months, and juveniles favour areas with a sandy or muddy substrate. Upon reaching maturity, the fish move onto deeper reefs and are rarely seen inshore or in estuaries. Adult squaretail kob often form large shoals. They feed primarily on small, benthic fish, while juveniles prefer crustaceans. They are fished commercially and recreationally.

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