Least Rasbora
Boraras urophthalmoides
RasborasAdvanced
Species Details
The smallest rasbora species. Extremely delicate and requires expert-level care.
Advanced Care Level
Basic Information
Size1.6 cm (0.6 inches)
TemperamentVery Peaceful
DietMicro foods only
Lifespan2-3 years
Tank Size30+ litres (8+ gallons)
Water Parameters
Temperature
25-28°C (77-82°F)pH Level
5.0-6.0Hardness
2-6 dGHTank Mate Recommendations
Based on 1 selected species
Current Selection:
Least Rasbora
Fully Compatible Species
Compatible
Harlequin Rasbora
Trigonostigma heteromorpha
RasborasSize:4.5 cm (1.8 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible
Lambchop Rasbora
Trigonostigma espei
RasborasSize:3.5 cm (1.4 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible
Scissortail Rasbora
Rasbora trilineata
RasborasSize:12-15 cm (5-6 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible
Redline Rasbora
Rasbora pauciperforata
RasborasSize:7 cm (2.8 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible
Brilliant Rasbora
Rasbora borapetensis
RasborasSize:5 cm (2 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible
Emerald Rasbora
Rasbora dorsiocellata
RasborasSize:6 cm (2.4 inches)
Care Level:Beginner
Temperament:Peaceful
100%
💡 Tank Mate Tips
• Consider adult size when planning tank space
• Research specific water parameter requirements
• Introduce new fish gradually to reduce stress
• Monitor behavior closely during the first weeks
Quick Facts
Smallest rasbora species
Tiny schooling fish reaching 1.6 cm (0.6 inches)
Peaceful but extremely delicate
Active swimmers needing groups of 15+
Translucent body with red markings
Perfect for very small nano tanks
Lives 2-3 years with proper care
Requires pristine water conditions
Very challenging to maintain
Most delicate of all rasboras
Compatibility Summary
Care Requirements
Tank Size30+ litres (8+ gallons)
Temperature25-28°C (77-82°F)
pH5.0-6.0
Hardness2-6 dGH