Max Size: 3.5cm

Swamp Blue Eye Rainbowfish (Pseudomugil paludicola)

The Swamp Blue-eye Rainbowfish is a small, hardy, adaptable and peaceful species that is easy to maintain, making them ideal fish for beginner aquarists and the more advanced aquarists. You can house these Rainbowfish in a nano aquarium or a well-planted aquarium alongside other small and peaceful species that appreciate the same environment and water conditions, or you can maintain them in a species-only, high-quality aquascaped aquarium.

Ideal tankmates for the Swamp Blue Eye Rainbowfish could include other Pseudomugil Rainbowfish such as the Red Neon Blue Eye, Spotted Blue Eye and the Popondetta Blue Eye. However, it should be noted Pseudomugil species can hybridise, so if you would like to breed this fish, other smaller Rainbowfish such as the Dwarf Neon Rainbowfish or the Celebes Rainbowfish would make more suitable tank mates.

Other possible tankmates can include other peaceful fish species of similar size, disposition, and water requirements, such as Rasboras, Gobies and smaller Barbs like Pentazona Barbs, Cherry Barbs and Checker Barbs. However, you should avoid maintaining them alongside much larger, more aggressive species.

Swamp Blue Eye Rainbowfish are a shoaling species; therefore, it would be better to keep them in a group of at least 8 to 10 individuals, preferably more. Maintaining these fish in such numbers will not only make them less nervous but will also result in a far more effective, natural-looking display.

The ideal aquarium setup for Swamp Blue Eye Rainbowfish would contain areas of dense vegetation, including some floating aquatic plants and driftwood roots and branches to help diffuse the light. A strong current in the aquarium is not necessary as these fish come from calmer stretches in the wild.

Swamp Blue Eye Rainbowfish have a semi-translucent body and a silvery abdomen and head, and in some individuals, their bodies shine a blueish silver under a particular light. The fins are also clear on these fishes, but their pelvic fin, anal fin and the edge of the second dorsal fin have a pale yellowish hue.

Tank Mates for the Swamp Blue Eye Rainbowfish

1 ideal tank mate ideas for the Swamp Blue Eye Rainbowfish include:

Skunk Corydoras(Corydoras granti)
Quick Facts
Scientific NamePseudomugil paludicola
Year Described1981
Other NamesYellow Fin Blue Eye Rainbowfish
OriginsPapua New Guinea
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 8+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH6.0 - 8.0
GH5 - 20
79 - 86℉
26.1 - 30℃

Photos of the Swamp Blue Eye Rainbowfish

Swamp Blue-eye Rainbowfish
Swamp Blue-eye Rainbowfish

Natural Habitat

Swamp Blue Eye Rainbowfish are endemic to New Guinea's island in West Papua and southwestern Papua New Guinea in Oceania, North of Australia. These fish inhabit clear, slow-flowing water in forest streams and swampy regions near the coast, including some tributaries of the rivers Pahoturi, Morehead and Binaturi. Their habitats have an abundance of aquatic vegetation.

What to feed the Swamp Blue Eye Rainbowfish

Swamp Blue Eye Rainbowfish are easy to feed and have no special requirements when it comes to what they eat. However, they typically only take food in the upper levels of the aquarium, so bear this in mind when feeding your fish.

It would be better to provide your Rainbowfish with a varied diet; this can include high-quality dried food such as flakes or granules alongside live, frozen or freeze-dried foods such as cyclops, daphnia, brine shrimp, and bloodworm.

How to sex the Swamp Blue Eye Rainbowfish

It is relatively straightforward to differentiate between the male and female Swamp Blue Eye Rainbowfish. The males exhibit brighter yellow colouration in the anterior part of the anal fin and on the caudal fin base, as well as on the outer edge of the second dorsal fin. In addition, the males are slightly larger and slimmer than females and have a longer dorsal fin. In contrast, females are smaller, duller and have shorter fins than males.

How to breed the Swamp Blue Eye Rainbowfish

Swamp Blue Eye Rainbowfish are egg layers that exhibit no parental care and will consume their eggs and fry if given the opportunity.

Spawning is more likely to occur in temperatures towards the upper end of the range. Females can deposit a few eggs daily for several days, attaching them to aquatic vegetation or spawning mops. An individual male might also mate with multiple females in a single day, and spawning will usually continue throughout the day during warmer periods.

There are two primary methods for breeding these fish. The first involves separating a small group of six to eight individuals or a single male and two or three females into a breeding tank with an air-powered sponge filter and spawning media such as java moss or wool mops. You should check the media daily and if any eggs are spotted, remove them to a separate tank for incubating and hatching. Alternatively, you can maintain a colony of adults in a more extensive, fully-decorated setup that should allow some fry to survive if well-planted.

The Rainbowfish fry initially spends most of their time close to the water's surface; therefore, it would be best to attach aquatic plants to d├ęcor high in the water column as this will produce the most favourable results. Floating plants with long roots are also recommended and will work just as well.

The second method is usually less productive but more straightforward and reliable. Also, a well-established planted aquarium offers relatively stable water conditions. In addition, the microfauna that grows can create a valuable early food source for the babies.

The eggs will usually hatch between 7 and 14 days later, depending on temperature, and the fry will be able to accept good quality dried powder, baby brine shrimp and microworm immediately. It would be better for the babies if you offered them small meals twice a day.

Aged water can result in a high mortality rate; therefore, you must perform small water changes every 2 to 3 days. In addition, any uneaten food should not be allowed to accumulate in the raising tank.

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: 14/03/2022 12:07:59 - Updated: 14/03/2022 12:24:37