Species profile
Clown Rasbora
Rasbora kalochroma
Peaceful
Moderate care
180 L minimum aquarium
8–10 cm adult size
Midwater
Minimum group: 8
About this species
General notes for hobby use.
A comparatively large rasbora from soft forest waters; keep a proper shoal and provide more swimming length than its shop size suggests.
Water parameters
Suggested general range for long-term care.
Temperature
24–28 °C
pH
4.5–7
GH
1–10 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: 8
Tank zone
Midwater
Territory level
None
Predation risk
Tiny fry
Bioload factor
1.2
Peaceful, active shoaler; group maintenance improves confidence and limits skittishness.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
No / caution
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
180 L
Minimum footprint
120 × 40 cm
Accepted scientific name
Rasbora kalochroma
Alternative names
Clown Rasbora, Bigspot Rasbora
Native range
Malay Peninsula, Sumatra and Borneo.
Natural habitat
Peat-swamp and blackwater forest streams with submerged wood and leaf litter. Use soft water, shaded cover and gentle flow.
Diet & feeding
Insects and small invertebrates plus quality dry foods; regular live/frozen foods improve condition.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Mature females are fuller-bodied; males are generally slimmer.
Breeding
Egg-scatterer with no parental care; adults may eat eggs.