Pseudomugil Furcatus – Rainbowfish – Facts | Traits | Tank | Size

Pseudomugil furcatus

Pseudomugil furcatus or Rainbow fish make a great addition to a community tank. Their smooth, rectangular bodies are made for velocity, and so they continuously make laps back and forth via the aquarium.

Pseudomugil furcatus – Rainbowfish profile

Many species develop to three to four inches in size and a small group of those fish can add extraordinary shade to your tank. While juveniles could have a comparatively drab look, they really stay as much as their name as they mature.

Males are particularly colorful in most species, creating vibrant yellow, orange, red, blue, and green shades, some with stripes or bars. Both men and women need to be saved within the aquarium so males retain their vibrant hues.

Rainbows are education fish, and it’s best to maintain them in teams of not less than 4 so that they really feel safe and keep within the open.

Pseudomugil furcatus Origins and Distribution

Fork-tailed rainbowfish are native to Peria Creek and the Kwagira River of eastern Papua New Guinea; they exist within the wild in solely a really small geographic space in Milne Bay Province.

They sometimes travel into close by rivers and tributaries, in all probability on account of drainage among the many completely different waterways.

These fish favor slow-moving streams lined with heavy vegetation; these environments make it straightforward for them to search out their favorite meals: zooplankton, phytoplankton, and invertebrates. Very few fork-tailed rainbowfish are collected within the wild. Because they’re straightforward to breed, they’re bred in captivity for aquarium commerce.

Pseudomugil furcatus Overview

The Forktail Rainbowfish (Pseudomugil furcatus) additionally know as tropical fish conserving fanatics because the Yellow Rainbow, is a peaceable, shoaling species that are present in a comparatively small space in eastern Papua New Guinea.

Specimens have been first collected from Peria Creek, Kwagira River and subsequently recorded within the Musa and Kwagila river basins, which each drain into Dyke Ackland and Collingwood Bay.

Forktail Rainbowfish are discovered within the clear, gradual to reasonably transferring, closely vegetated forest streams of their range the place they opportunistically feed on zooplankton, phytoplankton, and invertebrates.

Forktail Rainbows are hardy, energetic, darting swimmers, with smooth rectangular bodies that in an aquarium atmosphere need to be saved with not less than 10 or more of their very own sort.

Pseudomugil furcatus Description

Pseudomugil furcatus is a phenomenal little species that max out at a bit over 2 inches in size. These little gems have blue eyes with vivid, lemon yellow-edged dorsal, pelvic, and caudal fins, and darker yellow-edged anal fins. They have two upturned, wing-like pectoral fins which can be additionally vivid lemon yellow in shade.

Their body shade is predominantly silvery grey in shade with an orange/yellow throat. During the breeding season, the males are more extremely patterned and can develop vibrant yellow, orange, red, blue, and green shades with stripes or bars. The unpaired upturned fins within the males change into noticeably prolonged as they mature.

Females and juveniles are identically colored, however are drabber in look.

Colors and Markings

The fork-tailed rainbowfish is a really enticing species with blue eyes, a silvery body, and vivid yellow stripes on the top and backside of the body within the breeding season.

Two upturned nearly wing-like pectoral fins, vivid yellow in shade together with vivid yellow dorsal fins in breeding season make this little gem a great addition to any community aquarium.


Forktail Rainbowfish are finest housed in a long, densely planted, biologically mature aquarium of not less than 30-gallon capability, with darkish, positive gravel or sandy substrate, some river rocks, driftwood roots, and floating vegetation to diffuse overhead lighting.

They require effectively oxygenated water with not less than minimal water motion. A superb filtration system with a small energy head is very really helpful to duplicate these situations.

Pseudomugil furcatus could be housed in a biotope atmosphere nevertheless, they make an ideal addition to a peaceable community tank and could be housed with comparable species similar to tetras, danios, rasboras, different dwarf Rainbows, dwarf cichlids, or the Peacock Gudgeon (Tateurndina ocellicauda) which it happens within nature, and many others.


The easiest technique to breed Forktail Rainbowfish is to maintain a school of adults in a mature, densely planted aquarium with long-rooted floating vegetation like Water Hyacinth. The fish will mate naturally and the fry can have a prepared provide of meals obtainable once they hatch out.

Water Temperature

Forktail Rainbowfish are most certainly to spawn in temperatures around 83°F. Spawning usually happens throughout the daytime with the male mating with a number of females.

The females will deposit a couple of comparatively giant eggs on aquatic vegetation or any appropriate substrate, each day for an interval of a number of days.


Rainbows could be saved with all kinds of community tank mates like tetras, danios, rasboras, others Rainbows, dwarf cichlids, and comparable fish.

They will not be choosy eaters and can usually settle for flakes, pellets, and a range of frozen meals like mysis, brine shrimp, and different comparable gadgets.

They are not going to trouble vegetation and are perfect for planted aquariums. A long aquarium is finest to offer them loads of distance to swim back and forth within the tank.

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Pseudomugil furcatus Care

When making a habitat in your forktailed rainbowfish, do not forget that their native atmosphere is certainly one of slow-moving water with a great deal of vegetation. To recreate the same habitat, select a 30-gallon or bigger aquarium and add a darkish, positive, sandy, or rocky substrate.

Decorate with river rocks, driftwoods, rooted vegetation, and floating feathery-leafed vegetation. Floating vegetation over a darkish substrate is not going to solely carry out the colors on this species to the perfect impact, however, the fish shall be more comfy and calm.

Live vegetation is necessary for this fish to thrive. Be certain the water is effectively oxygenated. Use a robust filtration system however one that does not create an excessive amount of turbulence.

The fork-tailed rainbowfish may be very energetic; it’s not solely quick however agile as effectively, swimming, twisting, and turning out and in of vegetation playfully. They are a center zone fish and are in movement as long as aquarium lights are on.

It is finest to maintain two males along with 4 to 6 females to induce essentially the most energetic social shows. Fork-tailed rainbowfish need many hours of time to acclimatize to a brand new tank atmosphere.

Quick publicity to completely different water chemistry and temperature can shock their programs.

Pseudomugil furcatus Breeding

A various technique is to maintain a bunch of 6 to eight adults which can be not less than eight months old in a breeding tank with an air-powered sponge nook filter and a few Java Moss, or a spawning mop.

Feed the adults stay meals till mating happens and test they moss or mop for eggs each day. Separate the eggs from the adults as quickly as they’re detected right into a mature brooding tank for incubation.

Depending on water temperature, the eggs usually hatch out in 21 days. Unfortunately, due to years of inbreeding, count on that over half of the eggs shall be beneath sized, fail to develop or be infertile.

The fry is capable of eating microworms, child brine shrimp, or good high quality finely ground flake or fry meals instantly upon hatching.

Feed the fry small parts not less than twice a day and take away any accrued uneaten meals from the tank as quickly as possible. Partial water adjustments with aged aquarium water are additionally really helpful.

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Apparently, breeders are capable of getting eggs with developed embryos that haven’t hatched out to hatch, by putting them in a capsule container with some aquarium water and infrequently shaking it till the embryos hatch out. The strain change brought on by shaking the capsule container causes the eggs to hatch out. Neat trick.

In its natural atmosphere, the Forktail Rainbowfish is an omnivore that feeds on phytoplankton, zooplankton, invertebrates, and many others.

On the floor or suspended within the water column. In an aquarium atmosphere, they are going to eagerly settle for excellent high-quality crushed flake meals however they do finest on a diet of stay meals similar to Moina, Daphnia, brine shrimp, micro worms, and many others.

Gender Differences

Male fork-tailed rainbowfish could be distinguished by their sharper colors and a hanging fin form; fins are curved and nearly wing-like and are vivid yellow. Females and juveniles have the identical fundamental coloring as males, however, the colors will not be as sensible. Learn more about dragon-fish.

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