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Emerald Eye Rasbora
Brevibora dorsiocellata
Animalia›Chordata›Actinopterygii›Cyprinidae
📍 Southeast Asia
The emerald eye rasbora has a vivid electric-green eye and a subtle iridescent body. It is a small, peaceful schooling fish that adds movement to the upper-midwater of planted tanks. Undemanding and compatible with most community species.
Care Guide
Diet
Emerald Eye Rasboras are omnivores that thrive on a varied diet of high-quality micro pellets and fine flake foods as staples, supplemented 2-3 times weekly with live or frozen foods like daphnia and brine shrimp. Feed small amounts once daily, only what they can consume in 2-3 minutes, as overfeeding degrades water quality in their preferred smaller tanks.
Behavior
These are active, peaceful schooling fish that constantly move through mid-water zones in coordinated groups, displaying their characteristic emerald eyes and iridescent bodies. They are non-aggressive toward tankmates and show reduced stress and enhanced coloration when kept in groups of 10 or more, making them ideal for planted community aquariums.
Breeding
Breeding Emerald Eye Rasboras in captivity is difficult and rarely achieved in home aquariums. They require very specific conditions including soft, acidic water (pH 5.5-6.5), dense vegetation for egg scattering, and careful separation of fry, making successful breeding impractical for most hobbyists.
Tank Mates
Similar size, peaceful temperament, and identical water parameter requirements make them ideal community companions
Comparable size and behavior; both thrive in soft, slightly acidic planted tanks with minimal bioload
Peaceful invertebrates that occupy different ecological niches; ensure adequate plant cover for shrimp safety
Small, peaceful bottom-dwellers with identical water requirements; both prefer heavily planted environments
Peaceful gourami species with overlapping temperature ranges; monitor for any territorial behavior during breeding
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid gill movement, lethargy, rubbing against surfaces
Raise temperature gradually to 28-29°C, perform daily 25% water changes, and treat with aquarium salt (1 tsp per 5 gallons) or commercial ich medication for 7-10 days
Fin Rot
Frayed or deteriorating fin edges, discoloration at fin bases, progressive fin loss
Improve water quality through frequent partial water changes, remove any sharp tank décor, and treat with antibacterial medication if condition worsens
Bacterial Infection
Cloudy eyes, open sores, loss of appetite, color fading, torn fins
Perform 50% water change immediately, maintain pristine water conditions, and use broad-spectrum antibiotic medication if symptoms persist beyond 3 days
Parasitic Infection (Flukes)
Excessive scratching, clamped fins, rapid gill movement, visible parasites on gills
Treat with anti-parasitic medication (praziquantel-based), perform daily water changes, and quarantine affected fish to prevent spread
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Quick Facts
- diet
- Omnivore – micro pellets, fine flake, daphnia
- lifespan
- 3–5 years
- max size
- 3 cm (1.2 in)
- tank size
- 10 gallons minimum
- school size
- 10+
- temperament
- Peaceful, schooling
Water it likes
- ph
- 5.5–7.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 1–10 dGH
- temperature
- 73–81°F (23–27°C)