Redtail Shark – Epalzeorhynchos bicolor
The Redtail Shark is a striking freshwater fish known for its bold contrast of a sleek black body and vibrant, bright-red tail. Active and eye-catching, this semi-aggressive species makes a beautiful centerpiece in medium to large aquariums.
Redtail Sharks are territorial, especially toward similar-looking fish, but they generally coexist well with fast, robust community species. With proper care and space, they can live long, healthy lives and bring plenty of energy to your aquarium.
Key Details:
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Scientific Name: Epalzeorhynchos bicolor
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Common Name: Redtail Shark, Redtail Sharkminnow
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Origin: Thailand (Tank-Raised in the trade)
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Size Purchased: 1.5" – 2.5"
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Adult Size: ~5" – 6"
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Type: Freshwater Cyprinid
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Temperament: Semi-aggressive, territorial
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Tank Size: 55+ gallons recommended
Water Parameters:
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Temperature: 72–79°F
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pH: 6.5–7.5
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Hardness: Moderate
Diet:
Omnivorous. Feed a varied diet of high-quality pellets, flakes, algae wafers, and frozen or live foods (brine shrimp, bloodworms, daphnia) to keep them healthy and vibrant.
Care Notes:
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Provide plenty of hiding spaces (caves, driftwood, dense plants) to reduce aggression.
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Best kept singly, as they are highly territorial with their own kind.
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Compatible with medium-sized, active community fish (avoid slow or long-finned species).
Why Choose the Redtail Shark?
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Striking black-and-red coloration makes it a true showstopper.
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Hardy and long-lived (up to 8 years with good care).
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Adds energy, personality, and movement to community aquariums.