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Here is a complete care guide and full profile for the Harlequin Rasbora, a peaceful and vibrant freshwater fish loved for its shimmering color and easygoing nature.
🐟 Harlequin Rasbora – Full Details & Care Guide
✅ Common Names:
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Harlequin Rasbora
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Harlequin Fish
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Red Rasbora
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Harlequin
🔬 Scientific Classification:
| Category | Details |
|---|---|
| Scientific Name | Trigonostigma heteromorpha |
| Family | Cyprinidae |
| Order | Cypriniformes |
| Origin | Southeast Asia (Thailand, Malaysia, Sumatra, Singapore) |
🎨 Appearance:
| Feature | Description |
|---|---|
| Body Shape | Slender, torpedo-shaped |
| Color | Reddish-orange or pinkish body with a striking black triangular patch from mid-body to tail |
| Size | 1.75 to 2 inches (4.5 – 5 cm) |
| Lifespan | 5 – 8 years with good care |
| Sexual Dimorphism | Females are slightly larger and rounder; males more slender and brighter |
🌡️ Water Parameters:
| Parameter | Ideal Range |
|---|---|
| Temperature | 22 – 27°C (72 – 81°F) |
| pH Level | 6.0 – 7.5 |
| Hardness | 2 – 15 dGH |
| Water Type | Freshwater, slightly acidic to neutral |
🏡 Tank Setup:
| Feature | Recommendations |
|---|---|
| Minimum Tank Size | 10 gallons (best in 20+ for larger groups) |
| School Size | At least 6 (preferably 8–12 for natural behavior) |
| Substrate | Fine gravel or dark sand |
| Plants | Java Fern, Amazon Sword, Anubias, floating plants |
| Decorations | Driftwood, smooth rocks, leaf litter |
| Lighting | Moderate lighting enhances coloration |
| Filtration | Gentle to moderate; sponge or canister filters are ideal |
| Water Movement | Gentle – mimics their natural calm stream habitat |
🧠 Temperament & Behavior:
| Trait | Description |
|---|---|
| Temperament | Peaceful and calm |
| Schooling | Yes – happiest in groups |
| Swimming Zone | Middle to top of the tank |
| Activity Level | Active, synchronized swimmers |
| Compatibility | Excellent for community tanks |
🤝 Ideal Tank Mates:
| ✅ Good Tank Mates | ❌ Avoid These |
|---|---|
| Neon Tetras, Ember Tetras | Large or aggressive cichlids |
| Corydoras Catfish | Tiger Barbs (can nip fins) |
| Guppies, Mollies | Bettas (depends on temperament) |
| Dwarf Gouramis, Otocinclus | Fast, nippy fish |
| Shrimp (e.g., Amano) | Predatory fish |
🍽️ Feeding:
| Type | Examples |
|---|---|
| Staple | Micro pellets, high-quality flakes |
| Live/Frozen | Daphnia, brine shrimp, bloodworms |
| Veggie Treats | Spirulina-based foods |
| Feeding | 1–2 times daily, small portions |
🐠 Feed a varied diet to boost their colors and health.
🐣 Breeding Harlequin Rasboras:
| Category | Description |
|---|---|
| Spawning Type | Egg scatterers |
| Breeding Tank | Soft, acidic water, densely planted |
| Pairing | One male and one female (or small group) |
| Spawning Behavior | Courtship display, upside-down spawning on the underside of leaves |
| Egg Count | 50–100 eggs |
| Parental Care | None – remove adults post-spawning |
| Hatching Time | 24–36 hours |
| Fry Food | Infusoria, then baby brine shrimp |
🧼 Care Tips:
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💧 Perform weekly water changes (25–30%)
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🌿 Use real plants for comfort and breeding
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🔒 Keep a secure lid – rasboras may jump
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✅ Maintain stable water conditions
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🛑 Avoid overfeeding – they’re small eaters
🧾 Quick Profile Summary:
| Feature | Detail |
|---|---|
| Scientific Name | Trigonostigma heteromorpha |
| Common Name | Harlequin Rasbora |
| Size | Up to 2 inches |
| Temperament | Peaceful, schooling |
| Lifespan | 5 – 8 years |
| Care Level | Easy |
| Swimming Level | Mid – top |
| Best Tank Setup | Planted community tank |
| Diet | Omnivorous |
| Breeding | Easy (with setup) |
🌟 Highlights:
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🔸 Classic community fish perfect for beginners and experts alike
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🔸 Known for their striking black triangle marking
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🔸 Thrive in peaceful, planted tanks
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🔸 Great for aquascapes and nano setups
IMAGES ARE FOR REPRESENTATIVE PURPOSES ONLY.
We process orders on all weekdays (Monday to Saturday), excluding public holidays.
To avail free shipping, purchase amount should be Rs350/-(for Aquarium Accessories and Aquatic Plants) or more, less than the above amount shipping charges applicable Rs70/- only. For live fish delivery charges applicable at the time of checkout.
Orders are normally Shipped within 1-2 days and usually take 2-5 working days to be delivered based on your location. However, you will receive an approximate timeline when you place your order.
To ensure that your order reaches you quickly and in good condition, we only ship through reputed courier agencies.
To avail free shipping, purchase amount should be Rs350/-(for Aquarium Accessories and Aquatic Plants) or more, less than the above amount shipping charges applicable Rs70/- only. For live fish delivery charges applicable at the time of checkout.
Orders are normally Shipped within 1-2 days and usually take 2-5 working days to be delivered based on your location. However, you will receive an approximate timeline when you place your order.
To ensure that your order reaches you quickly and in good condition, we only ship through reputed courier agencies.
