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Maximum size : 5.5 cm

Forktail Blue Eye Rainbowfish - Pseudomugil furcatus : Complete Fish Profile & Care Guide

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The Forktail Blue-eye Rainbowfish (Pseudomugil furcatus) is a small, hardy, adaptable, and peaceful species that is easy to care for, making them an ideal choice for both beginner and advanced aquarists. Their stunning and striking coloration adds a captivating touch to any aquarium. Forktail Blue-eye Rainbowfish are a fantastic addition to nano or planted aquariums, where they can be housed with other small, peaceful species or showcased as the main attraction in a beautifully aquascaped tank. The optimal aquarium setup for these Rainbowfish includes dense vegetation, featuring floating aquatic plants, as well as driftwood roots and branches to help diffuse light. A dark background and substrate further enhance the fish's vibrant colors. The Forktail Blue-eye Rainbowfish boasts a grey to green body coloration with bright yellow edges on all fins, complemented by black margins on the rear dorsal, anal, and caudal fins. During spawning, males also display a striking red hue on their chest area. While the vibrant colors are not present in juveniles, they intensify as the fish mature.

Forktail Blue Eye Rainbowfish Photos

Sexual Dimorphism

Distinguishing between male and female Forktail Blue-eye Rainbowfish is relatively straightforward. Males exhibit more intricate patterns and their unpaired fins become noticeably elongated as they mature. Conversely, females display duller coloration and less complex patterning compared to their male counterparts.
Featured Male
Featured Female
Male Female

Quick Facts

Scientific NamePseudomugil furcatus
Year Described1955
Other NamesForktailed Rainbowfish, Blue Eye Forktail Rainbowfish
OriginsPapua New Guinea Papua New Guinea
Max Size5.5 cm
Aquarium LevelMiddle
Best kept asGroups 5+
Lifespanup to 3 year

Water Parameters

Water TypeFreshwater
PH6.0 - 8.0
GH8 - 18
KH5 - 12
75 - 79
23.9 - 26.1

Natural habitat

The Forktail Blue-eye Rainbow Fish is a fascinating species that call Collingwood Bay and Dyke Ackland Bay in Papua New Guinea their home. These stunning fish are exclusively found in the region and can be observed swimming gracefully in clear, lowland streams and tranquil pools that are enveloped by lush greenery. These remarkable creatures thrive in slow-moving water bodies that are surrounded by dense vegetation, creating a picturesque and serene environment that is perfect for observing their beauty. The sandy and rocky substrate in their habitats provides an ideal foundation for their playful and energetic behaviour. If you're a nature enthusiast or a passionate fish lover, exploring the world of Forktail Blue-eye Rainbow Fish is a must-do activity. Witnessing their unique and vibrant characteristics in their natural habitat is truly a sight to behold.

How to breed the Forktail Blue Eye Rainbowfish

Forktail Blue-eye Rainbowfish, known for their egg-scattering spawning behavior, do not provide parental care and may consume their eggs and offspring if given the opportunity. Increased temperatures within their preferred range enhance the likelihood of spawning. Over several days, females lay a few eggs daily, attaching them to aquatic plants or spawning mops. Males often mate with multiple females in a single day, with spawning generally continuing throughout warmer periods. Two main breeding methods exist for these fish. The first method involves isolating a small group of 6 to 8 individuals or one male with two or three females in a breeding tank fitted with an air-powered sponge filter and spawning materials like nylon mops or java moss. Inspect the media daily for eggs and, if discovered, move them to a separate tank for hatching and incubation. An alternative approach is to house a colony of adults in a more expansive, fully furnished setup. A densely planted environment may enable some fry to survive. Since fry tend to remain near the water's surface, it is advised to position aquatic plants high in the water column. Floating plants with extended roots can also prove beneficial. Though the second method may be less efficient, it is simpler and more dependable. A well-established planted aquarium ensures relatively stable water conditions, and the emerging microfauna can act as an initial food source for fry. Eggs usually hatch within 14 to 21 days, subject to temperature. Fry can instantly consume premium dried powder, baby brine shrimp, and microworms. Provide small, twice-daily meals for optimal growth. To minimize mortality rates, conduct small water changes every 2 to 3 days and refrain from allowing uneaten food to accumulate in the raising tank. Preserving water quality is essential for successfully raising Forktail Blue-eye Rainbowfish fry.

Diet & feeding

Forktail Blue-eye Rainbowfish thrive on a diverse diet, and these adaptable fish readily accept a wide range of food types. A high-quality tropical granule or flake food should serve as the staple of their diet. In addition to this, they will consume live, freeze-dried, or frozen meaty foods, such as Daphnia, blackworms, and brine shrimp. Forktail Blue-eye Rainbowfish also appreciate blanched vegetables as part of their balanced diet.


Forktail Blue Eye Rainbowfish (Pseudomugil furcatus) Freshwater Aquarium Fish Profile & Care Guide Thumbnail

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