Red Tail Black Shark — Fish Profile
Epalzeorhynchos bicolor
Quick Specs
| Adult Size: | 5.0" |
| Temperament: | semi-aggressive |
| Care Level: | intermediate |
| Min Tank Size: | 30 gallons |
| Temperature: | 72-80°F |
| pH Range: | 6.5-7.5 |
| Diet: | omnivore |
| Origin: | Southeast Asia (Thailand) |
| Lifespan: | 5-8 years |
Overview
Red Tail Black Sharks are striking freshwater fish with a jet-black body and vivid red tail fin. Despite the name, they are not true sharks but members of the carp family. They are highly territorial, especially toward their own kind and other bottom-dwelling fish. Provide plenty of hiding spots with caves and driftwood. Only one per tank is recommended.
Care Guide for Red Tail Black Shark
Tank Setup
Red Tail Black Shark requires a minimum tank size of 30 gallons. Maintain water temperature between 72°F and 80°F, with a pH range of 6.5 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Red Tail Black Shark with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Red Tail Black Shark is a omnivore feeder. Provide a varied diet appropriate for omnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as semi-aggressive. Red Tail Black Shark reaches an adult size of 5.0 inches and has a care level of intermediate. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Red Tail Black Shark originates from Southeast Asia (Thailand) and has an expected lifespan of 5-8 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
🔴 Risky Tank Mates
Compatibility Results for Red Tail Black Shark
All 69 compatibility checks involving Red Tail Black Shark:
Recommended for Red Tail Black Shark
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Expert Care Tips for Red Tail Black Shark
- Mid-size tank: Red Tail Black Shark needs 30+ gallons. Choose a tank at least 2× as long as the fish's adult size (5.0") for adequate swimming room.
- Tropical range: Keep Red Tail Black Shark at 72–80°F. A 50W heater per 10 gallons is a safe rule of thumb for stable temperature.
- Narrow pH tolerance: Red Tail Black Shark only tolerates pH 6.5–7.5. Test your tap water before buying — adjusting pH is harder than choosing the right fish for your water.
- Semi-aggressive temperament: Red Tail Black Shark is generally peaceful but can become territorial. Provide ample hiding spots and avoid housing with fin-nipping species.
- Acclimation: Always drip-acclimate Red Tail Black Shark over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.