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Desmopuntius pentazona, also called 5 Bands Barb, is a small Southeast Asian cyprinid valued for its striped pattern and peaceful behavior. Its coppery body usually carries five dark vertical bands, a combination that separates it from several related barbs. In nature, it inhabits soft water that is often acidic and stained by tannins, where vegetation and plant debris provide shelter. In an aquarium, this schooling species should be kept in a group and offered a planted layout with subdued lighting. Its commercial availability is variable but not exceptional, making it an appealing choice for a well-planned Asian community aquarium. The species looks best when settled, well fed and maintained in stable water conditions.

General description of the species

Desmopuntius pentazona is a small freshwater fish in the family Cyprinidae. It is schooling by nature and shows its most natural behavior when kept with at least six individuals, preferably more. The fish mainly occupy the middle level of the aquarium, moving actively without being constantly frantic. Their generally peaceful and somewhat shy temperament suits a community aquarium containing calm fish of similar size. Males may briefly chase one another, especially during breeding activity, but this does not usually develop into serious fighting. A mature aquarium with good filtration and regular maintenance encourages stronger color and confidence. The species appreciates moderate light, dense planting and shaded areas. It may become intimidated by much larger or highly boisterous tank mates, so a quiet community is the best choice.

Geographical origin and habitat

Desmopuntius pentazona comes from insular Southeast Asia, mainly Borneo and Sumatra, with records associated with parts of the Malay Peninsula. It inhabits slow forest streams, wooded swamps and small waterways influenced by peat environments. These habitats often contain soft, acidic, amber-colored water enriched with tannins from leaves, branches and forest litter. The bottom is generally made of mud, fine sand and plant debris. The forest canopy limits light, while roots, fallen leaves and aquatic plants create a network of hiding places. In the aquarium, roots, properly prepared catappa or oak leaves and gentle filtration can recreate some of this atmosphere. Reference countries: Indonesia and Malaysia.

Precise location and local name

The natural range is associated with forest drainage systems in Borneo and Sumatra, particularly in low-current habitats and areas connected with blackwater. In the aquarium trade, the fish is sold under several names, including 5 Bands Barb and Five-banded Barb. A practical French vernacular name is five-banded barb, although commercial terminology may vary between suppliers. It can sometimes be confused with other small striped barbs, including species within Desmopuntius. Identification relies mainly on the number, arrangement and intensity of the bands, as well as the overall body shape. Careful observation is useful when purchasing, since coloration may be dull in stressed fish or recently imported specimens.

Appearance and physical characteristics

The body of Desmopuntius pentazona is short, moderately deep and laterally compressed. Its background color ranges from golden beige to copper brown, crossed by five vertical dark brown to black bands. The fins are generally translucent and may show subtle red or yellow tones depending on the fish’s condition, sex and rearing conditions. Adult males tend to be slimmer and more intensely colored, while females are often fuller-bodied, especially when carrying eggs. The bands may become more pronounced during social interactions or spawning activity. The mouth is small and suited to taking fine foods in the water column, from surfaces and near the substrate. Adult size remains modest, at about 5 cm maximum, allowing the species to be kept in reasonably sized aquariums when open swimming space is preserved.

General diet

Desmopuntius pentazona is omnivorous and benefits from a varied diet. In the aquarium, provide quality flakes or small micro-pellets, supplemented with frozen or live foods such as daphnia, cyclops and small mosquito larvae. Some plant material can be supplied through foods containing algae or other vegetable ingredients. Meals should be small because the species has a modest mouth and body size. A varied diet supports stronger coloration, good body condition and breeding readiness. It is better to feed very small portions twice daily than to offer one large meal that settles on the bottom. Food particles and pellets should be small enough to swallow easily. Removing leftovers helps keep water stable, especially in a soft, acidic aquarium.

Essential data

• River of origin: Small forest waterways in the Borneo and Sumatra drainage systems
• Local name used: 5 Bands Barb, Five-banded Barb
• Origin of the scientific name: Desmopuntius is a genus name combining an idea of linking or banding with a form derived from Puntius; pentazona refers to the five body bands
• Etymology of the full name: Desmopuntius evokes joined or linked markings; pentazona means five zones or five bands
• Common or vernacular names: 5 Bands Barb, Five-banded Barb
• Family: Cyprinidae
• Subfamily: Barbinae
• Pronunciation: dez moh PUN tee us pen tah ZOH nah
• Discovery: Pieter Bleeker, 1853
• Maximum adult size: About 5 cm
• Water temperature and pH: 23 to 28 °C; pH 5.0 to 7.0
• Stream appearance and surrounding vegetation: Slow forest waters, often tannin-stained, with fallen leaves, roots, branches and dense vegetation
• Typical tank mates: Trigonostigma heteromorpha, Pangio semicincta, Brevibora dorsiocellata, Desmopuntius rhomboocellatus
• Temperament and behavior: Peaceful, schooling, periodically active and mainly found in the middle level
• Water depth: Shallow to moderate, in streams, forest ditches and swampy areas
• Sexual dimorphism: Males are usually slimmer and more colorful; mature females are fuller-bodied
• Bottom structure and flow: Mud, fine sand and plant litter; low to moderate flow

For greater success

To keep Desmopuntius pentazona successfully, provide a genuine group, clean water and a layout rich in shelter. Gentle filtration, plants and a few leaves on the bottom are more suitable than a bare aquarium with intense lighting. Maintaining a slightly acidic pH, stable temperature and consistently good water quality is especially important. Avoid aggressive tank mates or fish large enough to intimidate it. With fine, varied foods, subdued lighting and regular water changes, this small barb can display excellent color and natural schooling behavior. Patience during acclimation is often rewarded with fish that become more confident and active. Stability and peaceful surroundings are the most important long-term priorities.