Rainbow Shark
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Pictures of fish and fish in store may vary, these are just examples/fully grown fish

Rainbow Shark (Epalzeorhynchos frenatus) are a vibrant and captivating addition to your freshwater aquarium. With its stunning, iridescent colors and energetic personality, the Rainbow Shark adds a burst of brilliance and activity to your aquascape. This captivating fish is perfect for enthusiasts who appreciate bold and eye-catching species, and adding it to your aquarium will elevate your underwater world into a masterpiece of color and dynamism.

Care Guide: The Rainbow Shark (Epalzeorhynchos frenatus) is a beautiful fish that requires specific care to thrive and display its full spectrum of colors. Follow these guidelines to provide optimal conditions for the health and happiness of your Rainbow Shark:

Aquarium Setup:

  • Tank Size: A tank of at least 40 gallons is recommended to accommodate the Rainbow Shark’s territorial nature and its need for swimming space.
  • Substrate: Use smooth gravel or sand as substrate to prevent injury to the fish’s barbels.
  • Decor: Provide hiding spots with rocks, caves, and driftwood. Live or artificial plants can also be added, but ensure there is ample open swimming space.

Water Parameters:

  • Temperature: Maintain water temperatures between 72-79°F (22-26°C).
  • pH: Aim for a slightly acidic to neutral pH range of 6.5-7.5.
  • Hardness: Keep water hardness in the moderate range, around 5-12 dKH.

Filtration and Oxygenation:

  • Provide efficient filtration and good water circulation to maintain water quality.
  • Ensure proper surface agitation for oxygen exchange.

Diet and Feeding:

  • Rainbow Sharks are omnivorous. Offer a balanced diet of high-quality flake or pellet foods.
  • Supplement their diet with occasional live or frozen foods like bloodworms, brine shrimp, and daphnia.
  • Include some vegetable matter in their diet, such as blanched spinach or zucchini.


  • Choose tankmates carefully. Rainbow Sharks can be territorial and may not tolerate other bottom-dwelling or similarly colored fish.
  • Avoid keeping multiple Rainbow Sharks in the same tank unless it’s exceptionally large.

Behavior and Compatibility:

  • Rainbow Sharks are known for their territorial behavior, especially as they mature. Provide hiding spots and visual barriers to reduce aggression.
  • They may display some aggression towards similar-looking species, so be cautious when choosing tankmates.


  • Regular water changes are essential to maintain water quality and prevent waste buildup.
  • Keep the tank well-maintained and provide clean, well-oxygenated water.

Note: Rainbow Sharks are best kept as solitary fish in most cases due to their territorial nature. Males tend to be more aggressive toward each other, so keeping a single Rainbow Shark is often recommended.

Experience the stunning beauty and lively personality of the Rainbow Shark in your aquarium. Order now to witness the iridescent colors and energetic behavior of this captivating fish. Whether you’re an experienced hobbyist or a beginner, the Rainbow Shark will provide endless fascination and a burst of color to your freshwater aquarium.

Name: Rainbow Shark
Science Name: Epalzeorhynchos frenatus
Temperament: Peaceful

Max Size: 6″
pH: 6.5 – 7.5
Temperature: 72-79F°

Care Level: Easy
Life Expectancy: 15 Years

Minimum Tank Size Recommended: 40 Gallons
Groups: Recommended in groups 6+ / Thrives in groups 12+



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