A strikingly marked, large and fast torpedo barb endemic to the rivers of the Western Ghats in India. Active, oxygen-hungry and capable of growing sizeable, it needs a long tank and a sizable shoal; wild populations are threatened, so captive-bred stock is strongly preferred.
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Up to 14-15 cm (5.5-6 in); torpedo-shaped silver body with a bold black lateral stripe overlaid by a brilliant red line, and red-tipped fins.
Lifespan
5–8 years
Social needs
group
Native region
Western Ghats of Kerala and Karnataka, southern India (endemic)
Origin
Old World
Climate
🌴 Tropical
Water type
💧 Freshwater
Family
Cyprinidae
Genus
Sahyadria
Part of the Barbs
Active, social cyprinids that thrive in schools and bring constant motion to a planted community tank. Most are hardy and beginner-friendly but appreciate swimming room and the security of a proper group.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Photo coming soon
Minimum
Sub-adult shoal
75 gal / 284 L long
Sahyadria denisonii is a 6-inch active schooler — keep 6+. 75-gal long is a strict minimum for sub-adults; adults need more. Cool 22–25 °C, strong flow, hard rocky décor, and oxygen-rich water.
Recommended
Adult shoal display
125 gal / 473 L long
Six-foot 125-gal for an adult shoal of 6+, with smooth river-rock décor, strong current, and oxygenated cool water. Length is more important than gallons.
Anandarajkumar / CC BY-SA 3.0 (Wikimedia Commons)
Ideal
Hill-stream biotope
180 gal+ / 681 L+ biotope
Western Ghats hill-stream biotope with strong current, smooth river stones, sand and small pebbles, cool water, and a shoal of 8+. Closest to the wild streams this endangered fish came from.
KoS / CC BY-SA 3.0 (Wikimedia Commons)
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Egg
Fish eggs are small, translucent spheres, often laid in clutches on plants, substrate, or in a nest — or carried/brooded by a parent in livebearing and mouth-brooding species. A dark eye spot and the curled embryo become visible inside as development progresses.
Photo coming soon
Fry
Newly hatched fry are tiny and semi-transparent, frequently still carrying a yolk sac that fuels them before they feed freely. They lack full fin structure and adult coloration, staying near cover until they can swim and forage on their own.
Photo coming soon
Juvenile
Juveniles look like miniature adults but with developing fins and muted or different markings; many species shift pattern and color as they mature. Growth is rapid at this stage given clean water and steady feeding.
Adult
Adults show the species' full size, finnage, and mature coloration, and are sexually mature. Many fish develop sex-specific differences in size, color, or fin shape, which can intensify during breeding.
Habitat & enclosure
These are large, powerful swimmers needing a long tank of at least 250 L (55-60 gal) and ideally larger for a full group of adults. They prefer cooler, highly oxygenated water: 18-25 C (64-77 F), pH 6.5-7.8, soft-to-moderate hardness, with strong flow to mimic their hill-stream home. Bright lighting over a well-oxygenated, turbulent surface suits them.
They are endemic to fast-flowing, well-oxygenated rivers and streams of Kerala and Karnataka in the Western Ghats, a habitat that has made wild collection a conservation concern.
Substrate
Use fine gravel or sand with smooth river rocks and driftwood to recreate a flowing Western Ghats stream. Hardy or attached plants (anubias, java fern) work best, as the active fish and strong current can uproot delicate stems.
Equipment & setup
Use an oversized canister filter plus extra powerheads or a wavemaker to deliver strong current and surface agitation for high oxygenation; cooler rooms may make a chiller useful in hot climates. Bright lighting and a tight-fitting lid are recommended, as they are prone to jumping.
Diet
Omnivorous and greedy. Feed a varied diet of quality pellets/flake plus frozen and live foods (bloodworm, brine shrimp, daphnia) and plenty of vegetable matter — blanched vegetables, spirulina and algae help prevent them from nibbling soft plants. Feed generously but avoid fouling the water.
Behavior & temperament
Peaceful toward other fish but extremely active and best kept in a group of 6+ to disperse their energy and reduce nipping. Their size and speed suit robust community and larger fish: other big barbs, rainbowfish, larger tetras, peaceful cichlids, loaches and catfish; their boisterous swimming can stress timid or very small tankmates.
Health
Sensitive to poor water quality and low oxygen given their high metabolism — they are less forgiving than smaller barbs. Watch for ich, oxygen stress and stunting in undersized tanks; maintain pristine, oxygen-rich water and quarantine new fish. Buying captive-bred specimens reduces parasite load and eases pressure on wild populations.
Tips, DIY & hacks
Captive breeding requires hormone induction in commercial farms and is difficult in home tanks, so support farmed stock to protect the threatened wild fish. Provide the longest tank you can and a generous shoal — cramped or solitary individuals become skittish and lose color. Always keep the tank covered.
