Approx Max Length : 6cm

Black Ink Barb - Barbodes bunau Fish Profile & Care Guide

The Black Ink Barb (Barbodes bunau) is a freshwater species belonging to the Cyprinidae family, native to the river systems of Borneo, particularly in North Kalimantan, Indonesia. First described by Rachmatika in 2005, this species is adapted to tropical freshwater habitats, specifically benthopelagic zones, where it resides in the middle to lower water columns. Due to environmental threats and habitat degradation, Barbodes bunau is currently listed as Vulnerable on the IUCN Red List. A key distinguishing feature of this species is the prominent triangular blotch located beneath the dorsal fin.

Known for its peaceful nature, the Black Ink Barb is compatible with other non-aggressive fish with similar environmental requirements. Suitable tankmates include small to medium-sized cyprinids, tetras, and peaceful bottom-dwellers such as loaches. It is essential to avoid housing them with more aggressive species, as this could lead to stress or competition for resources. Like other members of the Barbodes genus, Black Ink Barbs are believed to be shoaling fish, and keeping them in groups of five to six individuals is recommended to reduce stress and promote natural behaviours.

Although not commonly available in the aquarium trade, creating an optimal environment is essential for the well-being of Barbodes bunau. A minimum tank capacity of 80 litres (approximately 20 gallons) is advised to replicate its natural habitat. Incorporating elements such as driftwood, rocks, and live plants will provide adequate hiding spaces and closely mimic its riverine ecosystem. Maintaining high water quality through efficient filtration is crucial, as this species thrives in clean, well-oxygenated water.

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Sexual Dimorphism

Sexual dimorphism in Black Ink Barbs is relatively subtle. Males may display more vibrant colouration during breeding periods, while females typically appear rounder and larger when carrying eggs. Careful observation over time, particularly during spawning seasons, can aid in distinguishing between the sexes.

Quick Facts

Scientific Name	Barbodes bunau
Year Described	2005
Kingdom	Animalia
Classification	Actinopterygii
Order	Cypriniformes
Family	Cyprinidae
Genus	Barbodes
Origins	Indonesia
Approx Max Size	6 cm
Temperament	Peaceful
Aquarium Level	Middle
Difficulty	Beginner - Intermediate
Shoaling	Yes
Best kept as	Groups 6+
Diet & Feeding	Omnivore
Reproduction	Egg-Scatterer
Average Lifespan	Up to 5 Years

Water Parameters

Water Type	Freshwater
pH	6.0 - 7.0
GH	5 - 12

Ideal Temperature Range
℉	75 - 82
℃	24 - 28

Natural Habitat

Black Ink Barbs are native to Indonesia and are found explicitly in North Kalimantan Province in Southeast Asia, with populations concentrated in the Sebuku and Sesayap rivers of Borneo. These fish inhabit clear or slightly murky waters with moderate currents, where the riverbeds consist of sandy or rocky substrates interspersed with abundant vegetation. Well-adapted to these environments, Black Ink Barbs thrive in captivity when provided with a similar setup. By carefully replicating their natural habitat, aquarists can help maintain the health and well-being of this rare species.

Breeding

Information regarding breeding Black Ink Barbs in captivity remains scarce, as the species is not commonly kept in home aquariums. However, based on the breeding behaviours of other species within the Barbodes genus, it is presumed that Barbodes bunau reproduces through egg scattering, depositing eggs over substrates or among aquatic plants without providing significant parental care. Successful breeding in captivity may be encouraged by isolating a well-conditioned pair or group in a dedicated breeding tank with soft, slightly acidic water conditions.

Diet & Feeding

In their natural habitat, Black Ink Barbs are likely omnivorous, feeding on a mix of small invertebrates, plant material, and organic detritus. To ensure optimal health in captivity, it is essential to provide a varied diet. High-quality flake foods and pellets, supplemented with live or frozen options like brine shrimp, bloodworms, and daphnia, along with vegetable-based foods, will help meet their nutritional needs and promote overall well-being.