A large, incredibly active schooling fish native to Papua New Guinea. They are highly prized for the dramatic, ragged splotches of bright orange or yellow that develop on the males. Like most large rainbowfish, they require highly oxygenated, slightly alkaline water and a long aquarium to accommodate their constant swimming.
Parkinson's Rainbowfish At a Glance
Parkinson's Rainbowfish Tank Requirements
Will Parkinson's Rainbowfish fit in your tank?
Care guides tell you what Parkinson's Rainbowfish needs, the next question is whether your tank can safely provide it. Test Parkinson's Rainbowfish against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
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Parkinson's Rainbowfish Water Parameters
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Parkinson's Rainbowfish Temperament & Compatibility
Parkinson's Rainbowfish Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Male
Males develop a deeper chest and striking, glowing orange or yellow patches along the posterior half of their body and fins. They display continuously to females and rival males, which is a spectacular sight in the aquarium.
Differs in 3 traits from base species
Also known as: Show Male, Orange, Yellow
Female
Females are slightly smaller, more streamlined, and display a plain silvery-olive coloration without the dramatic orange splotches. Keeping a higher ratio of females to males prevents the males from exhausting individual females with constant mating displays.
Differs in 3 traits from base species
Also known as: Silver, Unsexed
Parkinson's Rainbowfish Care Guide Summary
The Parkinson's Rainbowfish, scientifically known as Melanotaenia parkinsoni, belongs to the Rainbowfish family group. Adults reach a maximum size of approximately 13 cm and have a compressed 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 Parkinson's Rainbowfish requires a freshwater only aquarium with a minimum volume of 200 litres and a tank length of at least 120 cm. Water temperature should be maintained between 25°C and 30°C, with a pH range of 7–8.5 and a general hardness of 8–20 dGH. A moderate water flow is preferred.
The Parkinson's 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.
Parkinson's Rainbowfish Habitat Setup
When setting up an aquarium for the Parkinson's 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 light plant coverage for partial shade. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.
Parkinson's Rainbowfish Compatibility Notes
Classified as peaceful, the Parkinson's Rainbowfish is a schooling species that feels most secure in a sizeable group, where natural shoaling behaviour reduces stress and brings out their best colours. 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.
Parkinson's Rainbowfish Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Parkinson's Rainbowfish.
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
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Frequently Asked Questions About Parkinson's Rainbowfish
How big does Parkinson's Rainbowfish get?
Parkinson's Rainbowfish (Melanotaenia parkinsoni) typically reaches a maximum adult size of approximately 13 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Parkinson's Rainbowfish need?
A minimum aquarium volume of 200 litres and a tank length of at least 120 cm are recommended for Parkinson's Rainbowfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Parkinson's Rainbowfish need?
Parkinson's Rainbowfish thrives in freshwater only conditions with a temperature range of 25–30°C, a pH between 7 and 8.5, and a general hardness of 8–20 dGH. A moderate water flow is preferred.
Is Parkinson's Rainbowfish peaceful or aggressive?
Parkinson's Rainbowfish is classified as peaceful with an aggression score of 2 out of 10. They are generally well-suited to peaceful community tanks.
How many Parkinson's Rainbowfish should be kept together?
Parkinson's Rainbowfish is a schooling species and should be kept in groups of at least 6. Larger groups help distribute aggression and encourage natural schooling behaviour.
Does Parkinson's Rainbowfish have any special tank requirements?
Yes. Parkinson's Rainbowfish benefits from plants - lighly covered in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Parkinson's Rainbowfish need a lid on the tank?
Yes. Parkinson's 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 Parkinson's Rainbowfish
These fish are strong compatibility matches for Parkinson's Rainbowfish based on water preferences, temperament, adult size, and tank behavior.
Zebra Shovelnose (Tigrinus Catfish)
Brachyplatystoma tigrinum
Ideal Tank MatesEmerald Green Cory
Corydoras splendens
Ideal Tank MatesAngelicus Botia
Botia kubotai
Ideal Tank MatesGolden Bristlenose Pleco
Ancistrus sp. L144
Ideal Tank MatesAgassiz Cory
Corydoras agassizii
Ideal Tank MatesBengal Loach
Botia dario
Ideal Tank MatesPlants That Suit Parkinson's Rainbowfish
These plants pair well with Parkinson's Rainbowfish based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Anacharis
Egeria densa
Baby Tears
Lindernia rotundifolia
Balansae
Cryptocoryne crispatula
Belinda's Buce
Bucephalandra belindae
Fish Similar to Parkinson's Rainbowfish
Blue Rainbowfish
Melanotaenia caerulea
A small, highly active, and colorful schooling fish native to the Kikori River system in Papua New Guinea. They are peaceful but require ample swimming space and a school of their own kind to thrive. Like most rainbowfish, they appreciate well-oxygenated, flowing water and are excellent jumpers. Males develop a striking blue hue with reddish horizontal stripes.
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.
Axelrod's Rainbowfish
Chilatherina axelrodi
A highly active, colorful schooling fish native to Papua New Guinea. Known for a bluish-grey upper body and yellowish-white lower body divided by a dark lateral stripe. Like most rainbowfish, they are incredibly fast, active swimmers that require pristine water, moderate flow, and significant horizontal swimming space.
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.
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.
Allen's Rainbowfish
Chilatherina alleni
A rare and highly active rainbowfish native to West Papua, Indonesia (Wapoga River basin). Known as the 'Wapoga Rainbowfish', they undergo a dramatic color transformation as they mature, developing intense metallic blues, greens, and reds. As exceptionally fast, continuous swimmers, they require a 4-foot (120cm) aquarium minimum to thrive without stress.