Rasbora Dorsiocellata Care Guide: Hi-Spot Rasbora

Often overlooked beside its flashier cousins, the hi-spot rasbora is a 5-6 cm SE Asian shoaler that earns its place in any blackwater community. Rasbora dorsiocellata takes its scientific name from the distinctive dark eye-spot on the dorsal fin — a marking that flashes against the silver body when the fish turns into the light. Now formally placed in genus Brevibora by some taxonomists but still sold under the original rasbora dorsiocellata trade name, this peaceful schooler suits Singapore keepers wanting a hardy biotope-correct rasbora. This guide from Gensou Aquascaping at 5 Everton Park sets out parameters, group sizing and sourcing.

Origin and Habitat

The species ranges across Peninsular Malaysia, southern Thailand, Sumatra and Borneo, inhabiting slow-flowing forest streams and peat swamp margins. Water there runs slightly tea-stained, pH 5.5-7.0, conductivity 30-100 microsiemens, and 24-28°C. The species shoals over leaf-littered substrates with overhanging vegetation cover.

Tank Size

A shoal of eight to ten fish settles into 60 litres minimum. Larger groups of 15-20 in 90 litres show the most natural shoaling behaviour and best colouration. Length matters more than depth — go for a tank at least 60 cm long. Floating plants help reduce stress and keep the fish out in open water rather than hiding constantly.

Aquascape

Build around fine dark sand or fine gravel, three or four pieces of driftwood, leaf litter, and a moderate plant load. Cryptocoryne species, Java fern, and floating salvinia or frogbit suit the soft acidic conditions. ANS Catappa Leaves Large tint the water and give a biotope-accurate look.

Water Parameters

Target pH 5.5-7.0, GH 2-8, KH 1-4, temperature 24-27°C. Hi-spot rasboras tolerate a wider parameter range than many wild rasboras — Singapore PUB tap with chloramine neutralised works straight from the line. Avoid sudden swings in temperature or pH.

Filtration

A small canister or HOB filter handles a 60-litre shoal tank cleanly. Flow can be moderate — these fish enjoy gentle current. The aquarium filtration range includes options from sponge to canister appropriate for community shoal tanks.

Feeding

Omnivorous and easy. Quality micro-pellet, crushed flake, frozen daphnia, frozen bloodworm and live blackworm all eaten enthusiastically. Twice-daily feeding in small quantities suits the high metabolism of small shoaling fish. The community fish food range includes flake and pellet options.

Behaviour and Tank Mates

Strongly shoaling — never keep fewer than six, ideally ten or more. In groups, hi-spots stay in open midwater and display constant low-level chasing within the school. Compatible with chocolate gouramis, wild bettas of compatible size, sparkling gouramis, and small Corydoras species. Avoid fast active fish that outcompete them at feeding time.

Breeding

Egg-scattering rasbora typical of the genus. A separate breeding tank with mature spawning mop or fine-leaved plants, conditioned pair or trio, and slightly raised temperature triggers spawning. Adults eat eggs and need to be removed within hours. Fry are tiny and need infusoria for the first week before transitioning to baby brine.

Singapore Sourcing

Hi-spot rasboras appear regularly at Iwarna and Polyart Aquarium at SGD 3-6 per fish for wild stock from Sumatra or Peninsular Malaysia. Captive-bred specimens from European farms occasionally surface at slightly higher prices. House a shoal in a 60-90 cm tank from the aquarium tank range for best display.

Why This Species Suits Singapore Tanks

Hi-spot rasboras tick three boxes most local keepers want: hardy enough for tap water, genuinely peaceful with shy tank mates, and biotope-accurate for SE Asian setups. They pair particularly well with wild betta breeding tanks as dither, encouraging shy bettas to come out and feed. The dorsal eye-spot is also a useful diagnostic for distinguishing them from similar small silver rasboras at the shop.

Related Reading

• Harlequin Rasbora Singapore Wild Strain Care Guide
• Rasbora Axelrodi Blue Axelrod Care Guide
• Borneo Peat Swamp Blackwater Biotope Design Guide
• Blackwater Aquarium Chemistry Tannin Management Guide
• Wild Caught Fish Acclimation Protocol Singapore Guide