Species profile
Dwarf Rasbora
Boraras maculatus
Peaceful
Moderate care
30 L minimum aquarium
1.5–2.5 cm adult size
Mid–top
Minimum group: 10
About this species
General notes for hobby use.
Tiny spotted rasbora from slow, acidic forest waters. Needs a mature, gently filtered aquarium and small calm tankmates.
Water parameters
Suggested general range for long-term care.
Temperature
22–28 °C
pH
4–7
GH
1–10 dGH
KH
Not yet documented
Flow preference
Low
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Minimum group: 10
Tank zone
Mid–top
Territory level
Low
Predation risk
Tiny fry
Bioload factor
0.3
Peaceful shoaler easily intimidated by larger active fish. Keep in a substantial group with similarly tiny companions.
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
Low
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Carnivore
Minimum aquarium volume
30 L
Minimum footprint
45 × 30 cm
Accepted scientific name
Boraras maculatus
Alternative names
Dwarf Rasbora, Spotted Rasbora, Pygmy Spotted Rasbora
Native range
Malay Peninsula, southern Thailand, Sumatra and nearby islands.
Natural habitat
Quiet forest streams with slow-flowing acidic water, dense vegetation and botanical debris. Use gentle filtration and subdued lighting.
Diet & feeding
Micropredator feeding on worms and small crustaceans; provide appropriately tiny live/frozen and prepared foods.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Males are typically slimmer and more intensely coloured; females are fuller-bodied.
Breeding
Egg-scatterer among dense/fine vegetation with no parental care; FishBase notes spawning in shallow heavily vegetated water.