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Fish Freshwater Care: medium Peaceful

Snakeskin Barb

Desmopuntius rhomboocellatus
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Other names: Desmopuntius rhomboocellatus, Puntius rhomboocellatus, Barbus rhomboocellatus
Group: Barbs and cyprinids · Family: Cyprinidae · Origin: Southeast Asia — peat swamp forests of Borneo (Kalimantan)

A small blackwater barb whose ring-shaped dark blotches on a reddish body resemble snakeskin. Peaceful and shy; it shows its color in a soft, acidic, dimly lit tank.

Will it suit my tank?

Last updated October 16, 2026

Temperature
23–28°C
pH
5–7
Hardness
1–6 dGH
Adult size
5 cm
Minimum tank size
60 liters
Lifespan
4–6 years
Social structure
School
Group
at least 8, ideally 10+
Swimming zone
Middle
Diet
Omnivore
Breeding
Egg scatterer

Water parameters

Temperature23–28°C
pH5–7
General hardness (GH)1–6 dGH
Recommended range
Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The snakeskin barb is a small barb endemic to the blackwaters of Borneo. The dark blotches on its body take the form of rings or rhombuses with light centers; this pattern resembles snakeskin, which gives it its name. Its body color changes from orange-red to brownish depending on its surroundings and mood.

It is a peaceful, calm species. Because it is sensitive to water quality, it needs a mature tank with soft water.

Natural Habitat

October 16, 2026 · Suggest an edit

It lives in slow-flowing blackwaters in the peat swamp forests of Kalimantan. The water is tea-colored from tannins, very soft and acidic; the bottom is covered with fallen leaves and twigs.

Tank Setup

October 16, 2026 · Suggest an edit
  • Volume: at least 60 liters and 60 cm in length for a group of 8–10.
  • Water: 24–27°C; soft, acidic water (pH 5.5–6.5 is ideal). Stable parameters are important.
  • Decor: dark substrate, roots, dried leaves, dense planting and dim light with floating plants.
  • Flow: gentle; break up a strong filter outlet with plants or a sponge.
  • Maintenance: a 20–25% weekly water change; make parameter changes slowly. It should not be added to a newly set-up tank.

Diet

October 16, 2026 · Suggest an edit

Omnivorous. It accepts small granules and flakes; vary the diet with frozen brine shrimp, daphnia, cyclops and small bloodworms. Live foods improve color and condition.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Peaceful and somewhat shy. It behaves more boldly in a large group and in a planted, dimly lit setting; males occasionally display to each other.

Good companions: harlequin rasboras, small tetras, pencilfish, five-banded barbs, corydoras, otocinclus, dwarf shrimp.

Avoid: large, fast and dominant fish; aggressive cichlids.

Group and Colony Structure

October 16, 2026 · Suggest an edit

Keep at least 8, ideally 10 or more. The group forms a loose school; when kept in small numbers, the fish hide and lose their color.

Breeding

October 16, 2026 · Suggest an edit

An egg scatterer; it deposits its eggs on fine-leaved plants or moss and provides no parental care. Fish conditioned with soft, acidic water and live food may spawn in a separate breeding tank; since the parents eat the eggs, they should be separated afterwards.

Health and Common Problems

October 16, 2026 · Suggest an edit

It becomes stressed in hard water and fluctuating parameters; white spot and bacterial infections may occur. Quarantine new arrivals and acclimate them to the water slowly. Move fish that were kept in hard water at the store gradually to soft, acidic water over a few days. Farm-bred fish are somewhat more flexible, but even so their color fades noticeably above pH 7.

Sexing

October 16, 2026 · Suggest an edit

Males are slimmer and redder, especially while displaying. Females have a fuller belly and paler tones.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026