Buy Harlequin Rasbora (Trigonostigma heteromorpha) Online in Canada

Looking to add timeless elegance, warm copper tones, and tight schooling action to your planted aquarium? Monster Aquarium Canada offers healthy, vibrant Harlequin Rasboras (Trigonostigma heteromorpha). Native to the soft-water forest streams and peat swamps of Malaysia, Singapore, and Sumatra, these iconic freshwater fish are world-famous for their rich reddish-orange bodies and signature black triangular wedge marking. They are an absolute staple for aquascapers across Canada.

Why Choose Harlequin Rasboras for Your Aquarium?

Harlequin Rasboras are one of the most reliable, hardy, and visual species for planted community aquariums. Explore our full catalog of live exotic livestock to build your ultimate community display.

Classic Metallic Colors & Schooling Behavior

Reaching a compact adult size of 1.5 to 2.0 inches (3.8 to 5 cm), Harlequin Rasboras showcase a brilliant metallic copper-pink body set off by a deep blue-black triangular patch on the rear half. When kept in groups, they exhibit tight, synchronized schooling movement through the middle water column.

Exceptional Hardiness & Peaceful Temperament

Harlequins are famous for their peaceful, non-aggressive nature. They make ideal community tankmates for tetras, gouramis, peaceful cichlids, livebearers, dwarf shrimp, and bottom-dwelling loaches or corydoras.

Care Guide & Optimal Tank Parameters

To bring out their rich copper-pink tones and maintain long-term vitality, provide clean water with gentle filtration. Keep your setup running at peak performance with our premium canister filters and water treatments.

Water Quality & Tank Environment

• Minimum Tank Size: 10 to 20 Gallons (larger tanks encourage tight shoaling)

• Temperature: 72°F – 80°F (22°C – 27°C)

• pH Range: 6.0 – 7.5 (Tolerates a wide range, prefers soft to neutral water)

• Aquarium Decor: Densely planted backgrounds, dark substrate, driftwood, floating plants, and low to moderate current.

Feeding & High-Grade Nutrition

Harlequin Rasboras are enthusiastic mid-water feeders. Provide a varied diet of high-quality tropical flakes, color-enhancing micro-pellets, and frozen treats like bloodworms, brine shrimp, and daphnia from our aquarium food catalog.

Frequently Asked Questions (FAQs)

How big do Harlequin Rasboras grow?

Harlequin Rasboras reach an average adult size of 1.5 to 2.0 inches, making them slightly larger and rounder in body shape than Lambchop or Glowlight Rasboras.

How many Harlequin Rasboras should be kept together?

They are a shoaling species and should always be kept in groups of at least 6 to 10 individuals. Larger groups help them feel confident and display their tightest schooling movements.

What is the difference between Harlequin Rasboras and Lambchop Rasboras?

Harlequin Rasboras (Trigonostigma heteromorpha) feature a broader body shape and a larger, distinct triangular black patch, whereas Lambchop Rasboras (Trigonostigma espei) have a sleeker body and a thinner, cleaver-shaped black marking.

How do you ship live Harlequin Rasboras across Canada?

At Monster Aquarium Canada, all livestock is packed in insulated containers with temperature-controlled heat or ice packs depending on the current weather. Every order is delivered via express overnight shipping backed by our 100% Live Arrival Guarantee.

What is the average lifespan of a Harlequin Rasbora?

In a well-maintained home aquarium with consistent maintenance and balanced nutrition, Harlequin Rasboras regularly live between 5 to 7 years.