Harlequin Rasbora

Trigonostigma heteromorpha

RasborasBeginner
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Species Details

The most popular and hardy rasbora species. Perfect community fish with distinctive triangular marking.

Beginner Care Level

Basic Information

Size4.5 cm (1.8 inches)
TemperamentPeaceful
DietOmnivorous
Lifespan3-5 years
Tank Size75+ litres (20+ gallons)

Water Parameters

Temperature
22-28°C (72-82°F)
pH Level
6.0-7.5
Hardness
5-15 dGH

Tank Mate Recommendations

Based on 1 selected species

Current Selection:

Harlequin Rasbora
Fully Compatible Species
Compatible

Angelfish

Pterophyllum scalare

Cichlids
Size:15 cm tall, 20 cm long (6 inches tall, 8 inches long)
Care Level:Beginner
Temperament:Peaceful/Semi-aggressive
100%
Compatible

Tanganyikan Cichlids

Various Lamprologus, Julidochromis, Neolamprologus

Cichlids
Size:5-20 cm (2-8 inches)
Care Level:Intermediate
Temperament:Semi-aggressive
100%
Compatible

Lambchop Rasbora

Trigonostigma espei

Rasboras
Size:3.5 cm (1.4 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible

Scissortail Rasbora

Rasbora trilineata

Rasboras
Size:12-15 cm (5-6 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible

Redline Rasbora

Rasbora pauciperforata

Rasboras
Size:7 cm (2.8 inches)
Care Level:Beginner
Temperament:Peaceful
100%
Compatible

Brilliant Rasbora

Rasbora borapetensis

Rasboras
Size:5 cm (2 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

Most popular rasbora species

Small peaceful schooling fish reaching 4.5 cm (1.8 inches)

Hardy and easy to care for

Active swimmers needing groups of 6+

Beautiful orange-pink body with black triangle

Great community tank fish

Lives 3-5 years with proper care

Active swimmer needing swimming space

Perfect beginner rasbora

Excellent for planted tanks

Compatibility Summary

Compatible Species6
Requires Caution2
View full compatibility analysis →

Care Requirements

Tank Size75+ litres (20+ gallons)
Temperature22-28°C (72-82°F)
pH6.0-7.5
Hardness5-15 dGH

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