Rainbow Shark

Rainbow Shark
Latin name:
(Epalzeorhynchos frenatus)

Care Level





Black, Red



Preferred Conditions

72-79° F, KH 10-15, pH 6.5-7.5

Avg. Max Size


Minimum Tank Size

50 gallons


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Rainbow Shark: A Guide to Keeping and Caring for This Fascinating Fish

The rainbow shark is a striking and active fish that can add a splash of color and personality to any aquarium. With its vibrant coloration and playful behavior, it’s no wonder why this fish is a popular choice among aquarists. But before you bring one of these beautiful creatures home, it’s important to understand their needs and how to properly care for them.

Rainbow Shark: An Overview

The rainbow shark, scientifically known as Epalzeorhynchos frenatus, is a species of cyprinid fish native to Southeast Asia. They are found in the Mekong River basin, as well as in Thailand, Cambodia, and Vietnam. These fish are known for their elongated, torpedo-shaped bodies and their vibrant coloration, which can range from shades of red, orange, yellow, and green. Rainbow sharks are also known for their playful and active behavior, making them a joy to watch in the aquarium.

Choosing the Right Rainbow Shark for Your Aquarium

When choosing a rainbow shark for your aquarium, there are a few things you need to keep in mind. First, these fish can grow to be quite large, reaching up to 6 inches in length. Therefore, it’s important to choose an aquarium that is at least 30 gallons in size. Rainbow sharks are also schooling fish, so it’s best to keep them in groups of at least six. This will help to reduce aggression and ensure that all of the fish have enough space to swim and explore.

Creating the Ideal Habitat for Rainbow Sharks

Rainbow sharks are relatively easy to care for, but they do have some specific needs that must be met in order to thrive. These fish prefer warm water, with a temperature range of 75-80 degrees Fahrenheit. They also need a pH level between 6.5 and 7.5 and a hardness level between 5 and 15 dGH. Rainbow sharks are omnivores and will eat a variety of foods, including live, frozen, and flake foods. It’s important to offer them a varied diet to ensure that they are getting all of the nutrients they need.

Common Rainbow Shark Diseases and Treatments

Rainbow sharks are generally healthy fish, but they are susceptible to a few common diseases. These include ich, fin rot, and bacterial infections. Ich is a parasitic infection that can cause white spots on the fish’s body and fins. Fin rot is a bacterial infection that can cause the fins to become frayed and damaged. Bacterial infections can cause a variety of symptoms, including lethargy, loss of appetite, and swelling. If you think your rainbow shark is sick, it’s important to quarantine it immediately and treat it with the appropriate medication.

FAQs About Rainbow Sharks

Q: How big do rainbow sharks get?

A: Rainbow sharks can grow to be up to 6 inches in length.

Q: What is the ideal tank size for rainbow sharks?

A: The ideal tank size for rainbow sharks is at least 30 gallons.

Q: What is the best way to feed rainbow sharks?

A: Rainbow sharks should be fed a varied diet of live, frozen, and flake foods.


Rainbow sharks are beautiful and active fish that can add a splash of color and personality to any aquarium. With proper care and maintenance, these fish can thrive for many years. So, if you’re looking for a new addition to your aquarium, the rainbow shark is a great option to consider.