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Red Rainbowfish (Glossolepis Incisus)

The Red Rainbowfish is one of the more significant varieties of their kind. They are hardy, peaceful and active fish.

The Red Rainbowfish is a beautiful fish that can adapt to various water conditions making them extremely popular in the community aquarium.

The Red Rainbowfish sports a long, slender body with a highly arched back and a very thin head. They have big eyes, a deeply forked mouth and two dorsal fins. The males display a dazzling blood-red body and fin colour. The body is emphasised with silver scales.

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Red Rainbowfish
Red Rainbowfish
Red Rainbowfish
Red Rainbowfish
Quick Facts
Scientific NameGlossolepis Incisus
Other NamesSalmon-red Rainbowfish, Red Irian Rainbowfish, and New Guinea Red Rainbowfish
ClassificationActinopterygii
OrderAtheriniformes
FamilyMelanotaeniidae
GenusGlossolepis
OriginsPapua New Guinea
TemperamentPeaceful
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
ShoalingYes
Best kept asGroups 6+
DietOmnivore
ReproductionEgg-Scatterer
Lifespan6 - 8 years
Water Parameters
Water TypeFreshwater
PH7.0 - 8.5
GH10 - 20
Temperature
72 - 82℉
22.2 - 27.8℃

Feeding

In the home aquarium, the Red Rainbowfish will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Tank Mates

1 interesting tank mate ideas for the Red Rainbowfish could include:

Denison Barb(Sahyadria denisonii)

Sexual Dimorphism

It is straightforward to determine the sexual variations between males and females. The males have a much higher back, only display the red colouration, have longer fins and are much more territorial than the females, whereas the females are an olive-brown colour and are much calmer.

Breeding

Breeding the Red Rainbowfish is straightforward once these fish are happily established and settled into your aquarium. You will need a mature pair or group of males and females, along with a spawning mop, preferably floating at the top of the aquarium downwards to the substrate.

Despite spawning year-round, Rainbowfish lay many eggs at the beginning of the rainy season. In addition, temperature increases, and live and frozen foods often encourage spawning.

Check your spawning mops daily for any eggs that have been deposited and either remove the eggs from the mop or, better still, remove the entire mop to avoid contamination of the Rainbowfish eggs.

Tip: Have several spawning mops at hand so you can place a fresh spawning mop into the aquarium while you wait for the eggs to hatch on the other mop/s.

Place the spawning mop with eggs still attached into a separate small cycled aquarium with a sponge filter for flow, and add a few drops of Methylene Blue (Methylene Blue helps prevent fungal infections of eggs).

Your rainbowfish Eggs will hatch within 7 to 18 days, depending on the species and the temperature. We recommend 27°C = 80.6°F for the fastest development of fry.

Once the Rainbowfish fry hatch, they absorb their yolk sacs quickly and become free swimming, moving towards the water's surface. Once the fry reaches the water's surface, you can start feeding. We recommend feeding on Micorworm (the most straightforward live food to culture) and decapsulated brine shrimp egg powder several times a day while being careful not to overfeed and pollute the water column.

After a week or two, you can start to add newly hatched brine shrimp, but this isn't necessary to achieve a high success rate in our experience.

Rainbowfish fry grows slowly, so you should expect to wait several months before the fry is large enough to be added to the adult colony.

Other Rainbowfish of interest

Banded Rainbowfish(Melanotaenia trifasciata)
Boesemans Rainbowfish(Melanotaenia Boesemani)
Celebes Rainbowfish(Marosatherina ladigesi)
Dwarf Neon Rainbowfish(Melanotaenia praecox)
Forktail Blue Eye Rainbowfish(Pseudomugil furcatus)
Honey Blue Eye Rainbowfish(Pseudomugil Mellis)
View all Rainbowfish
Date Added: 02/09/2020 - Updated: 12/08/2022 13:18:35