The Goldie River Rainbowfish is a vibrant, highly active schooling fish native to the clear rainforest streams and backwaters of southern New Guinea. As rapid swimmers, they require significant open swimming space. They are voracious mid-water and surface feeders that will readily eat insects and standard aquarium foods. While peaceful, their exuberant energy can intimidate shy tank mates.
Goldie River Rainbowfish At a Glance
Goldie River Rainbowfish Tank Requirements
Will Goldie River Rainbowfish fit in your tank?
Care guides tell you what Goldie River Rainbowfish needs, the next question is whether your tank can safely provide it. Test Goldie River Rainbowfish against your tank size, maintenance needs, and the fish you already keep before you buy.
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Goldie River Rainbowfish Water Parameters
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Goldie River Rainbowfish Temperament & Compatibility
Goldie River Rainbowfish Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Male
Males develop a pronounced arched back (deep-bodied) as they mature, displaying vibrant coppery-brown hues, darker mid-lateral stripes, and longer, pointed dorsal and anal fins. Males actively and persistently court females.
Differs in 1 trait from base species
Also known as: Show Male, Standard
Female
Females are slightly smaller, possess a more streamlined body shape, and display more subdued, silvery-coppery coloration with rounded fins. It is highly recommended to keep more females than males to disperse breeding harassment.
Differs in 1 trait from base species
Also known as: Unsexed Juvenile
Goldie River Rainbowfish Care Guide Summary
The Goldie River Rainbowfish, scientifically known as Melanotaenia goldiei, belongs to the Rainbowfish family group. Adults reach a maximum size of approximately 11.5 cm and have a fusiform body shape with a moderate growth rate. Classified as peaceful, this species primarily occupies the surface and mid-level zones of the aquarium and produces a low level of biological waste.
To thrive, the Goldie River Rainbowfish requires a freshwater only aquarium with a minimum volume of 130 litres and a tank length of at least 90 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 7–8 and a general hardness of 8–16 dGH. A moderate water flow is preferred.
The Goldie River Rainbowfish is a rewarding species to keep, provided its core environmental needs are met. This species is available in 2 varieties: Male and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Goldie River Rainbowfish Habitat Setup
When setting up an aquarium for the Goldie River Rainbowfish, a moderate water flow best suits their natural preferences. Because this species occupies the surface and mid-level zones, the aquarium layout should prioritise adequate surface area with floating cover to make them feel secure near the waterline and open swimming space in the centre of the tank for free movement. Useful additions include dense planting to provide cover, break sightlines, and reduce stress. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.
Goldie River Rainbowfish Compatibility Notes
Classified as peaceful, the Goldie River Rainbowfish is a social species that requires the company of its own kind to thrive. When choosing tankmates, shy or slow-feeding tankmates may be outcompeted at feeding time and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the surface and mid-level zones can help reduce competition and territorial overlap.
Goldie River Rainbowfish Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Goldie River Rainbowfish.
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
Show 9 more tank sizes
Goldie River Rainbowfish Feeding & Diet Considerations
The Goldie River Rainbowfish will eat fry, so breeding efforts in the same tank are unlikely to succeed and is an aggressive eater that may prevent timid tankmates from getting enough food, so target feeding or simultaneous feeding at opposite ends of the tank can help.
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Frequently Asked Questions About Goldie River Rainbowfish
How big does Goldie River Rainbowfish get?
Goldie River Rainbowfish (Melanotaenia goldiei) typically reaches a maximum adult size of approximately 11.5 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Goldie River Rainbowfish need?
A minimum aquarium volume of 130 litres and a tank length of at least 90 cm are recommended for Goldie River Rainbowfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Goldie River Rainbowfish need?
Goldie River Rainbowfish thrives in freshwater only conditions with a temperature range of 24–28°C, a pH between 7 and 8, and a general hardness of 8–16 dGH. A moderate water flow is preferred.
Is Goldie River Rainbowfish peaceful or aggressive?
Goldie River Rainbowfish is classified as peaceful with an aggression score of 2 out of 10. They are generally well-suited to peaceful community tanks.
Can Goldie River Rainbowfish live alone?
No, Goldie River Rainbowfish should be kept in groups of at least 5 to reduce stress and encourage natural behaviour.
Does Goldie River Rainbowfish have any special tank requirements?
Yes. Goldie River Rainbowfish benefits from plants - densely covered in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Goldie River Rainbowfish need a lid on the tank?
Yes. Goldie River Rainbowfish is a known jumper, and a tight-fitting lid or cover is essential to prevent escape. Even a small gap can be enough for a determined fish to leap out.
Top Tank Mates for Goldie River Rainbowfish
These fish are strong compatibility matches for Goldie River Rainbowfish based on water preferences, temperament, adult size, and tank behavior.
Mottled Loach
Paracanthocobitis botia
Ideal Tank MatesSchwartz's Cory
Corydoras schwartzi
Ideal Tank MatesLeopard Cory
Corydoras leopardus
Ideal Tank MatesGold Laser Cory
Corydoras sp. 'CW010'
Ideal Tank MatesDainty Cory (Salt and Pepper Cory)
Corydoras habrosus
Ideal Tank MatesZebra Shovelnose (Tigrinus Catfish)
Brachyplatystoma tigrinum
Ideal Tank MatesPlants That Suit Goldie River Rainbowfish
These plants pair well with Goldie River Rainbowfish based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Baby Tears
Lindernia rotundifolia
Balansae
Cryptocoryne crispatula
Fish Similar to Goldie River Rainbowfish
New Guinea Rainbowfish
Melanotaenia affinis
An active, schooling species native to the streams of northern New Guinea. Known for their striking lateral stripe and vibrant fin coloration that flashes during morning displays. They are peaceful but highly energetic, requiring ample open swimming space and highly oxygenated water to thrive.
Mubi Rainbowfish
Melanotaenia mubiensis
A rare, energetic, and colorful schooling fish native to the clear, limestone-filtered streams of the Kikori River system in Papua New Guinea. As they mature, males develop striking colors and deep bodies. Like most rainbowfish, they are highly active, requiring long aquariums with moderate flow and moderately hard, alkaline water to thrive.
Murray River Rainbowfish
Melanotaenia fluviatilis
A robust and active schooling fish native to the cooler waters of the Murray-Darling basin in Australia. Unlike many tropical rainbowfish, it thrives in subtropical or unheated aquariums at normal room temperatures. They are peaceful but extremely fast swimmers, requiring long tanks with plenty of open swimming space.
Barred Rainbowfish
Chilatherina fasciata
A robust, active, and highly colorful schooling fish native to the clear, fast-flowing streams of New Guinea. They are named for the distinctive vertical black bars on their lower flanks. As highly active swimmers that do best in hard, alkaline water, they require a spacious, long aquarium (minimum 4 feet) with strong oxygenation and plenty of open swimming space.
Bulolo Rainbowfish
Chilatherina bulolo
A rare and highly active rainbowfish native to the fast-flowing mountain streams and white-water rapids of the Markham and Ramu river systems in Papua New Guinea. They possess a silvery body with a distinct black streak on the upper and lower edges of the caudal fin. Because of their specialized natural habitat, they require highly oxygenated, fast-flowing water and alkaline conditions to thrive in an aquarium.
Fly River Rainbowfish
Melanotaenia sexlineata
A brilliantly colored, peaceful dwarf rainbowfish native to the upper Fly River system in Papua New Guinea. Recognized by its golden-turquoise sheen, distinctive horizontal stripes, and sometimes bright pink lips. Being an exceptionally active shoaling species, they require significant lateral swimming space despite their small size.