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Harlequin Rasbora (Trigonostigma heteromorpha) 2-2.5cm

$599 CAD
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SKU: 400000010809

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Harlequin Rasbora (Trigonostigma heteromorpha) 2-2.5cm

Description

Harlequin Rasbora (Trigonostigma heteromorpha) is a peaceful, vibrant freshwater fish native to Southeast Asia, and it's a favorite among aquarists for its schooling behavior and striking appearance. 

Species Overview

  • Scientific Name: Trigonostigma heteromorpha
  • Common Names: Harlequin Rasbora, Red Rasbora
  • Family: Cyprinidae
  • Size: 1.75–2 inches (4.5–5 cm)
  • Lifespan: 5–8 years
  • Temperament: Peaceful, shoaling
  • Tank Level: Mid-dweller

Appearance

  • Body Color: Copper-orange to pinkish-red
  • Markings: Distinctive black triangular wedge on the rear half of the body
  • Sex Differences:
    • Males: Slimmer, more vibrant colors, rounded wedge
    • Females: Larger, fuller belly, straighter wedge 

Tank Requirements

  • Minimum Tank Size: 10 gallons (20+ gallons preferred for larger schools)
  • Water Temperature: 72–81°F (22–27°C)
  • pH: 6.0–7.8
  • Hardness: 2–15 dGH
  • Substrate: Dark sand or gravel enhances coloration
  • Décor: Dense vegetation, floating plants, driftwood, leaf litter
  • Lighting: Subdued or dim lighting preferred

Diet

  • Type: Omnivore / Micropredator
  • Foods:
    • Flake and micro pellets
    • Live/frozen: Brine shrimp, daphnia, bloodworms
    • Vegetables and algae-based foods
  • Feeding Frequency: 2x daily; avoid overfeeding 

Tank Mates

  • Ideal companions:
    • Tetras, Danios, Corydoras, Dwarf Gouramis, Bettas (1 per tank), Shrimp
  • Avoid:
    • Large or aggressive fish that may prey on them 

Breeding

  • Method: Egg-layer (not scatterer)
  • Spawning Behavior:
    • Female inverts under broad leaves to lay eggs
    • Male fertilizes eggs during spawning dance
  • Conditions:
    • pH ~6.0, temp ~80°F (27°C), soft water
    • Use plants like Cryptocoryne or Anubias
  • Fry Care:
    • Eggs hatch in ~24–48 hours
    • Fry feed on infusoria, then baby brine shrimp 

Specifications
  • Category
    Rasboras
  • Species Type
    Harlequin Rasbora
  • Water Temperature
    72°F to 80°F
  • Minimum Tank Size
    10 Gallons
  • Water pH Level
    Acidic, Neutral
  • Habitat Preference
    Planted Tanks, Driftwood, Rocky Tanks
  • Behaviour
    Community Fish, Shoaling

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Harlequin Rasbora (Trigonostigma heteromorpha) 2-2.5cm | Tetras Rasboras & Pencilfish | Largest Tropical Fish Selection at Your Local Fish Store
Sunbeam Aquatics

Harlequin Rasbora (Trigonostigma heteromorpha) 2-2.5cm

$599 CAD

Harlequin Rasbora (Trigonostigma heteromorpha) is a peaceful, vibrant freshwater fish native to Southeast Asia, and it's a favorite among aquarists for its schooling behavior and striking appearance. 

Species Overview

  • Scientific Name: Trigonostigma heteromorpha
  • Common Names: Harlequin Rasbora, Red Rasbora
  • Family: Cyprinidae
  • Size: 1.75–2 inches (4.5–5 cm)
  • Lifespan: 5–8 years
  • Temperament: Peaceful, shoaling
  • Tank Level: Mid-dweller

Appearance

  • Body Color: Copper-orange to pinkish-red
  • Markings: Distinctive black triangular wedge on the rear half of the body
  • Sex Differences:
    • Males: Slimmer, more vibrant colors, rounded wedge
    • Females: Larger, fuller belly, straighter wedge 

Tank Requirements

  • Minimum Tank Size: 10 gallons (20+ gallons preferred for larger schools)
  • Water Temperature: 72–81°F (22–27°C)
  • pH: 6.0–7.8
  • Hardness: 2–15 dGH
  • Substrate: Dark sand or gravel enhances coloration
  • Décor: Dense vegetation, floating plants, driftwood, leaf litter
  • Lighting: Subdued or dim lighting preferred

Diet

  • Type: Omnivore / Micropredator
  • Foods:
    • Flake and micro pellets
    • Live/frozen: Brine shrimp, daphnia, bloodworms
    • Vegetables and algae-based foods
  • Feeding Frequency: 2x daily; avoid overfeeding 

Tank Mates

  • Ideal companions:
    • Tetras, Danios, Corydoras, Dwarf Gouramis, Bettas (1 per tank), Shrimp
  • Avoid:
    • Large or aggressive fish that may prey on them 

Breeding

  • Method: Egg-layer (not scatterer)
  • Spawning Behavior:
    • Female inverts under broad leaves to lay eggs
    • Male fertilizes eggs during spawning dance
  • Conditions:
    • pH ~6.0, temp ~80°F (27°C), soft water
    • Use plants like Cryptocoryne or Anubias
  • Fry Care:
    • Eggs hatch in ~24–48 hours
    • Fry feed on infusoria, then baby brine shrimp 
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