Purple Harlequin Rasbora (Trigonostigma heteromorpha) - Live Fish

Purple Harlequin Rasbora (Trigonostigma heteromorpha)

Graceful schooling fish with a shimmering purple sheen

The Purple Harlequin Rasbora is a striking color variant of the classic Harlequin Rasbora, beloved for its iridescent violet body tones and distinctive black triangular patch. Hardy, active, and peaceful, this species is ideal for community aquariums, where their schooling behavior creates a stunning visual display.

🔍 Quick Facts

• Scientific Name: Trigonostigma heteromorpha

• Common Name: Purple Harlequin Rasbora

• Origin: Southeast Asia (Thailand, Malaysia, Sumatra)

• Size: 1.5–2" (3.5–5 cm)

• Temperament: Peaceful, social schooling fish

• Lifespan: 5–8 years

• Care Level: Easy

🏡 Ideal Aquarium Setup

• Minimum Tank Size: 15 gallons

• Temperature: 72–82°F (22–28°C)

• pH Range: 6.0–7.5

• Water Hardness: Soft to moderately hard

• Tank Setup Tips:

  • Keep in schools of 8 or more for best color and natural behavior

  • Planted aquariums with dark substrates enhance their purple hues

  • Provide open swimming space along with gentle filtration

🍽️ Diet

Omnivorous and easy to feed:

• High-quality flakes or micro-pellets

• Frozen or live foods: daphnia, bloodworms, brine shrimp

• Occasional vegetable-based foods for balance

🐣 Breeding

• Egg scatterers that prefer broad-leaved plants (like Cryptocoryne) for spawning

• Soft, slightly acidic water encourages breeding

• Remove adults after spawning to protect eggs

🌟 Fun Facts

• The purple variant has been selectively bred for its shimmering violet body color

• Their triangular patch is a key identifier of Harlequin Rasboras

• Excellent choice for aquascaped or planted community aquariums

💧 The Purple Harlequin Rasbora brings a unique violet shimmer and lively schooling energy to any freshwater setup—perfect for aquarists who love vibrant yet peaceful fish!