Fishician®Diet
Omnivore – sinking pellets, algae wafers, frozen bloodworms, vegetables
Aquarium species profile
Rainbow Shark
Epalzeorhynchos frenatum · Southeast Asia (Mekong, Chao Phraya basins)
Minimum tank55 gal
Adult size6"
Care levelEasy
TemperamentSemi-Aggressive
Temperature72–80°F
pH range6.5–7.5
Compatible tank mates
Mid-water fish that occupy different zones; Barbs, Rainbowfish, larger tetras
Tank mates to avoid
Other Rainbow Sharks, Red Tail Sharks, similar-shaped bottom fish
Care notes
Territorial bottom-dweller. Keep only one per tank. Black body with bright red fins. Often confused with Red Tail Black Shark.
Check the whole aquarium. Tank size alone does not establish compatibility. Confirm adult size, water overlap, social grouping, territory, diet, and the individual animals before stocking.