Species profile
Emerald Dwarf Rasbora
Danio erythromicron
Peaceful
Moderate care
60 L minimum aquarium
2–3 cm adult size
Midwater
Minimum group: 10
About this species
General notes for hobby use.
Cooler, mineral-rich Lake Inle species. Dense vegetation and a substantial group help reduce shyness and male sparring.
Water parameters
Suggested general range for long-term care.
Temperature
21–25 °C
pH
6.5–7.5
GH
10–25 dGH
KH
Not yet documented
Flow preference
Low–moderate
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Minimum group: 10
Tank zone
Midwater
Territory level
Low
Predation risk
Tiny fry
Bioload factor
0.4
Peaceful but males display and spar. Keep ten or more with dense cover and calm tankmates.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
Yes
Snail safe
Yes
Cave breeder
No
Digs substrate
No
Jump risk
Yes
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Omnivore
Minimum aquarium volume
60 L
Minimum footprint
60 × 30 cm
Accepted scientific name
Danio erythromicron
Alternative names
Emerald Dwarf Rasbora, Emerald Dwarf Danio, Celestichthys erythromicron, Microrasbora erythromicron
Native range
Lake Inle basin, Shan State, Myanmar.
Natural habitat
Clear, shallow, densely vegetated lake margins and connected waters. Avoid excessive heat and strong current.
Diet & feeding
Tiny quality dry foods with frequent Daphnia, Artemia and other small live/frozen foods.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Males are slimmer, brighter and more strongly barred; females are fuller and plainer.
Breeding
Egg-scatterer among plants/moss; adults may prey on eggs and fry.