Rainbow Shark, also known as the red fin shark, is a popular freshwater fish species among aquarium enthusiasts. Scientifically known as Epalzeorhynchos frenatum, it belongs to the Cyprinidae family. Despite its name, the rainbow shark is not a true shark; it is a type of freshwater carp. The “shark” part of its name comes from its physical resemblance to sharks, particularly its streamlined body and dorsal fin.
Rainbow sharks have a dark black or deep brown body with bright, iridescent red or orange fins, which give them their name. They also have a pointed snout, giving them a shark-like appearance.
As juveniles, they are quite small, around 2 to 3 inches (5 to 7.5 cm), but they can grow up to 6 inches (15 cm) in length when fully matured.
Rainbow sharks can be territorial and aggressive towards other fish, especially if they feel their territory is being invaded. They might also exhibit aggressive behavior towards similar-looking species.
For a single rainbow shark, a tank with a minimum capacity of 50 gallons is recommended. If you plan to keep multiple rainbow sharks, you’ll need an even larger tank to provide enough space and reduce territorial conflicts.
They prefer a stable aquarium environment with a temperature range of 72 to 82°F (22 to 28°C), a pH between 6.5 and 7.5, and moderate water hardness.
Provide plenty of hiding spots and caves using rocks, driftwood, or artificial decorations. This will help to create territories and minimize aggression. Also, consider using a substrate like sand or smooth gravel, as they like to dig.
Carefully choose tankmates that are compatible with rainbow sharks. Avoid keeping them with other bottom-dwelling or similarly shaped fish, as they might perceive them as competitors.
With proper care, rainbow sharks can live for several years, up to 5 to 8 years.
III. Is this fish species peaceful or hostile?
- Recommended: 5 and more
- Overall hostility: Peaceful
- Hostility towards own species: Peaceful
- Hostility towards other Species: Peaceful
IV. Species compatibility
- Angelfish.
- Discus Fish.
- Kissing Gourami
- Boeseman’s Rainbowfish
- Blood Parrot Cichlid
- Black Ghost Knife Fish
- Tinfoil Barbs
- Clown Loach
V. How to feed this species?
Rainbow sharks are omnivorous, and their diet should consist of high-quality pellets or flakes, supplemented with occasional live or frozen foods like bloodworms, brine shrimp, or daphnia.
Recommended food
- Omega One Super Color Floating Pellets
- Fluval Bug Bites Tropical Fish Food
Word for the wise