Rainbow Shark

From Microcosm Aquarium Explorer

Jump to: navigation , search
Epalzeorhynchos frenatus - (Fowler, 1934)
Rainbow Shark

Sharklike only in body shape, but a species for more rambunctious communities of larger species. JJPhoto.dk


The Rainbow Shark is an interesting fish related to the barbs and danios. It tends to be a territorial species that may be aggressive, particularly toward its own kind and should not be housed with small, passive species. An albino morph has been established. Do not purchase dyed fish sold by some stores.

Family: Cyprinidae

Other common name(s):

  • Ruby Shark
  • Rainbow Sharkminnow

Native range:

Habitat: Like other members of the genus Epalzeorhynchos, the Rainbow Shark is a loner that prefers a densely planted aquarium decorated with rocks and driftwood, allowing the fish to avoid other tankmates during its continuous forays throughout the tank.

Maximum length: 15 cm (6 in)

Minimum aquarium size: 114 L (30 gal)

Water: Freshwater 22 °C (72 °F) - 26 °C (79 °F)

General swimming level: Everywhere


Omnivore. The Rainbow Shark is an easy-to-feed species that will accept a wide variety of aquarium fare, including flake, freeze-dried and frozen foods. Include vegetable matter like Spirulina-based foods, as well. It will also graze on algae.

Aquarium Compatibility

House as a solitary individual with other active species that occupy the midwater and upper areas of the tank like Barbs and Rainbowfish.


Although it has been bred in the aquarium, spawnings are rare because of its aggressive nature toward its own kind.


Its aggressiveness seems to increase with age, and may be minimized with a larger aquarium and plenty of hiding places.

Reference: 101 Best Tropical Fishes
Image credit: JJ
Text credit: KW