Giant Barb

The Giant Barb holds the distinction of being the largest member of the family Cyprinidae on Earth, with confirmed records of wild individuals exceeding 150 cm and 300 kg. Native to the main Mekong River and its largest tributaries in Thailand, Laos, Cambodia, and Vietnam, it is critically endangered in the wild due to overfishing, dam construction, and habitat loss. In the aquarium trade, captive-bred juveniles are occasionally offered by specialist suppliers.

This is emphatically not a fish for home aquariums. Even juveniles grow rapidly and will quickly outgrow all but the largest tanks; adults require facilities equivalent to those found in public aquariums. Those facilities that do maintain Giant Barbs report them to be extremely peaceful, gentle fish that coexist with a wide range of tankmates and can become extraordinarily tame.

Fasting Giant Barbs feed primarily on algae, phytoplankton, and aquatic vegetation in the wild. In captivity they accept spirulina pellets, leafy greens, and algae wafers. Every purchase of a captive-bred specimen directly supports conservation breeding programmes working to preserve this magnificent species.

Water: 22–28°C, pH 6.5–7.5, moderate hardness; large-volume, pristine water quality essential. Tank: 5000 L absolute minimum for long-term housing; professional facility recommended. Feeding: Herbivore; spirulina pellets, algae wafers, leafy green vegetables, aquatic plants. Breeding: Documented in specialised facilities; not achievable in standard home aquariums. Compatibility: Extremely peaceful; shares space with virtually any non-predatory fish of appropriate size.