Red Rainbowfish

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Glossolepis incisus - Weber, 1907
Red Rainbowfish

Male Red Rainbowfish in spectacular in breeding colors.


Here is a species that becomes truly flamboyant when in full spawning condition. (See Glossolepis genus article for pair not yet in their prime.)

Rainbowfishes are active schoolers with many admirable qualities. They are best kept in groups of two females for every male—or larger schools in bigger tanks. The high arch of the back increases with age. These fish are slow to color up, requiring maturity and a mate to reach full coloration. Females are smaller than the males.

Family: Melanotaeniidae

Other common name(s):

Native range:

Habitat: The aquarium should have a layer of floating plants and be aquascaped around the perimeters, leaving plenty of open swimming room in the center. Decorate sparingly with rocks, driftwood, and a dark substrate and a planted backdrop.

Maximum length: 12 cm (5 in)

Minimum aquarium size: 114 L (30 gal)

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

General swimming level: Midwater to top.


Omnivore. Takes prepared, frozen and live foods with equal enthusiasm. It is an active hunter that will capture live prey the instant it hits the water.

Aquarium Compatibility

Tankmates should be peaceful community types that have differing swimming habits and occupy different zones in the aquarium.


Pairs spawn in the morning and scatter the eggs, which adhere to fine-leaved plants and the roots of floating plants. Spawning mops can be used to collect eggs for hatching.


These fish jump; cover the tank securely.

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