Barbonymus Gonionotus

Datasheet

General Description

Barbonymus Gonionotus, also known as Javan barb, is a species belonging to the Cyprinidae family. The classification under Cypriniformes places it within the group of opportunistic omnivores primarily feeding on invertebrates, algae, smaller fish, plant matter, and various other food sources available in its habitat.

Aquarium Setup

For this species, a significant tank size of a minimum 750 litres with robust, similarly-sized tankmates is essential in the aquarium setup. Providing ample open swimming-space and ensuring water quality are crucial. An external filter that offers adequate oxygenation and water flow is necessary alongside a secure, fitted cover due to the fish's occasional skittish nature.

Behaviour

Barbonymus Gonionotus is not inherently aggressive but can predate on smaller fishes while displaying continuous activity and vigorous feeding behavior. It thrives in large schools and may exhibit aggressive behavior when kept in insufficient numbers, emphasizing the importance of maintaining a sizable group for natural interactions and reduced aggressiveness.

Feeding and Diet

As an omnivorous species, Javan barbs are opportunistic feeders accepting a wide range of foods, including live and frozen options such as bloodworms, Daphnia, and Artemia. A varied diet composed of quality dried foods, vegetables like peas and spinach, and protein sources such as earthworms and prawns is recommended. Care should be taken to avoid overfeeding, especially with larger specimens.

Reproduction & Dimorphism

While not commonly bred in home aquariums, Barbonymus Gonionotus is cultured for food in certain regions using hormone stimulation to induce spawning. This egg-scattering species exhibits no parental care with females having a deeper body when gravid. Successful breeding in captivity would require substantial space, prevention of cannibalism, and resources for rearing a large number of offspring.

Habitat and Distribution

In its natural habitat, the species primarily occupies slow-moving river channels and floodplains, with increasing sightings in artificial canals and lakes. Barbonymus Gonionotus is widespread across Southeast Asia, including countries like Cambodia, Thailand, and Indonesia, inhabiting river systems like the Mekong and Chao Phraya. Its adaptability to man-made environments showcases its expanding distribution range.