Black Rainbow Shark (Epalzeorhynchos frenatum) – Striking Freshwater Aquarium Shark Care

Black Rainbow Shark – Care & Profile

The Black Rainbow Shark (Epalzeorhynchos frenatum, black variant) is a striking freshwater fish known for its jet-black body and fins. A color morph of the classic Rainbow Shark, this bottom-dwelling species adds a bold and dramatic presence to large aquariums. Semi-aggressive and territorial, it’s best suited for experienced aquarists with community setups that can accommodate its space needs.

🌊 Quick Facts:

• Scientific Name: Epalzeorhynchos frenatum (Black variant)
• Common Names: Black Rainbow Shark, Black Shark
• Origin: Southeast Asia (Mekong & Chao Phraya river basins)
• Temperament: Semi-aggressive, territorial
• Adult Size: 5–6 inches
• Tank Size: 55+ gallons
• Diet: Omnivore (algae wafers, sinking pellets, vegetables, live/frozen foods)
• Water Parameters: 72–79°F, pH 6.5–7.5

✨ Why Choose Black Rainbow Sharks?

• Unique, dramatic all-black coloration makes it a standout fish
• Active bottom dweller with fascinating behavior
• Hardy and adaptable once established
• Helps control algae as part of its diet

💡 Care Tips:
Provide a large aquarium with plenty of hiding spots (caves, driftwood, rocks) to help reduce aggression. Best kept singly unless in very large tanks. Avoid slow-moving or long-finned tank mates that may be harassed. Feed a balanced diet of algae wafers, protein-rich sinking pellets, fresh vegetables, and frozen foods for best health.