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🐠 Red Widow Tetra Overview
| Category | Details |
|---|---|
| Common Name | Red Widow Tetra |
| Scientific Name | Gymnocorymbus ternetzi (color morph) |
| Family | Characidae |
| Origin | Amazon Basin, South America (color variant is captive-bred) |
| Size | 1.5 to 2 inches (3.8–5 cm) |
| Lifespan | 3 to 5 years |
| Temperament | Peaceful, slightly nippy if kept alone |
| Difficulty | Easy to moderate |
🎨 Appearance
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Body Shape: Classic tetra shape—flattened sides and deep body.
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Color: Bright red hue (developed via selective breeding), often semi-transparent with solid red pigmentation.
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Fins: Can be translucent or slightly red.
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Gender Differences:
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Females: Slightly larger and plumper.
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Males: Slightly slimmer and more colorful.
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🔴 Note: This is a variant of the Black Widow Tetra (Gymnocorymbus ternetzi) bred for vibrant red coloration. There are also other color variants like white, blue, and gold.
💧 Water Parameters
| Parameter | Ideal Range |
|---|---|
| Temperature | 72–79°F (22–26°C) |
| pH | 6.0–7.5 |
| Hardness | 5–15 dGH |
| Tank Size | Minimum 15 gallons |
Keep a school of at least 6–8 fish to reduce stress and aggression.
🏡 Tank Setup
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Substrate: Dark gravel or sand helps enhance coloration.
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Decor: Plants (Java fern, Amazon sword), driftwood, caves.
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Lighting: Moderate (too bright can cause stress).
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Filtration: Gentle to moderate flow.
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Heater: Yes, to maintain tropical temperatures.
🍽️ Diet
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Feeding Type: Omnivorous.
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Staple Foods:
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High-quality flake food
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Micro-pellets
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Treats:
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Frozen/live brine shrimp
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Daphnia, bloodworms
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Blanched spinach or zucchini (occasional)
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Feed small portions 2 times a day. Avoid overfeeding.
👥 Behavior & Compatibility
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Schooling: Strongly prefers to be in groups of 6 or more.
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Activity Level: Active mid-level swimmers.
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Temperament: Peaceful but may nip fins if isolated.
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Tank Mates:
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Guppies, mollies, platies
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Corydoras, rasboras
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Tetras (neon, ember, glowlight)
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Shrimp and snails
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❌ Avoid long-finned or slow-moving fish (e.g., bettas, angelfish).
🐣 Breeding
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Spawning Type: Egg scatterer.
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Breeding Tank Setup:
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Fine-leaved plants or spawning mops
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Soft, slightly acidic water
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Gentle filtration and dim lighting
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Spawning Behavior:
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Happens early morning.
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Eggs are laid and fertilized over plants.
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Fry Care:
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Eggs hatch in 24–36 hours.
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Remove adults to prevent egg-eating.
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Feed fry infusoria or powdered fry food.
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🩺 Common Health Issues
| Issue | Cause / Symptom | Prevention / Treatment |
|---|---|---|
| Ich | White spots on body and fins | Quarantine & treat with medication |
| Fin Rot | Frayed fins | Clean water + antibacterial meds |
| Bloat | Swollen belly from overfeeding | Feed balanced, high-fiber diet |
| Stress | Color loss, hiding, darting behavior | Maintain stable water + proper group size |
✅ Summary
| Trait | Details |
|---|---|
| Size | 1.5–2 inches |
| Group Size | 6+ (schooling fish) |
| Lifespan | 3–5 years |
| Diet | Omnivorous |
| Ideal Temp | 72–79°F (22–26°C) |
| Tank Size | 15+ gallons |
| Tank Level | Mid-level swimmer |
| Best For | Community aquariums |
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