Profile Photo

Maximum size : 8 cm

Lake Kurumoi Rainbowfish - Melanotaenia parva : Complete Fish Profile & Care Guide

Table of contents


Lake Kurumoi Rainbowfish (Melanotaenia parva) is a captivating and peaceful species that thrives in planted community aquarium setups. To provide these vibrant fish with an ideal habitat, it is recommended to create a spacious tank, as they are fairly active swimmers. 

Maintaining them in groups of 6 or more is essential, as they naturally are inclined to shoal. Lake Kurumoi Rainbowfish coexist harmoniously with other peaceful community fish and pose no threat to smaller tankmates, as their narrow mouths prevent them from swallowing them. However, avoiding keeping them with long-finned fish is advisable to prevent any potential fin nipping.

In their natural environment, Lake Kurumoi Rainbowfish are typically found along the muddy shorelines of the lake, often densely populated with vegetation. Recreating this habitat in the aquarium is easily achieved by using a sandy or muddy substrate, depending on personal preference, and incorporating an abundance of aquatic plants. Controlling the lighting to ensure it is not overly bright can be accomplished by incorporating floating plants, adding to the overall aesthetics. Maintaining a high water flow and consistently excellent water quality, with regular weekly water changes, are vital for the health and well-being of these remarkable fish.

Lake Kurumoi Rainbowfish exhibit two distinct male colouration types. The first type showcases a pale lilac or bluish body colouration, adorned with a striking black mid-lateral stripe and vibrant red fins. In contrast, the second type features a silvery body with mesmerizing red speckles and eye-catching red fins. Along the sides of the body, the second type exhibits a thin red stripe between each row of scales. While the females may not display the same vivid colouration as the males, their presence adds a sense of balance and diversity to the aquarium.

Juvenile Lake Kurumoi Rainbowfish may initially appear drab compared to their adult counterparts, sometimes leading to their oversight in aquarium shops. However, as they acclimate to the security and tranquillity of a well-planted aquarium, these young specimens gradually unveil their stunning adult beauty, captivating all who observe their mesmerizing transformation.

Lake Kurumoi Rainbowfish Photos

Sexual Dimorphism

Differentiating between male and female Lake Kurumoi Rainbowfish is a straightforward task, as distinct visual cues set them apart. Mature males exhibit a remarkable display of vibrant colours, notably showcasing an increased presence of red pigmentation, particularly in their fins, including the dorsal fin. Notably, larger males may develop a humpback as they reach maturity, further distinguishing them from females.

On the other hand, females possess a more subdued colouration, characterized by a prevalence of brown hues within their scales. These observable differences in colouration and body shape serve as reliable indicators when discerning between male and female Lake Kurumoi Rainbowfish.

Quick Facts

Scientific NameMelanotaenia parva
Year Described1990
Other NamesParva Rainbow, Sunset Dwarf Rainbowfish, Kurumoi Rainbowfish, Parva Rainbowfish
Max Size8 cm
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 6+
LifespanUp to 8 Years

Water Parameters

Water TypeFreshwater
PH6.5 - 7.5
GH5 - 15
76 - 82
24 - 28

Natural habitat

Nestled within the breathtaking landscapes of the Vogelkop Peninsula in West Papua, Indonesia, lies the exclusive domain of the Lake Kurumoi Rainbowfish. This remarkable species has staked its claim in the pristine waters of Lake Kurumoi, a picturesque oasis situated 400 meters above sea level. The lake, an integral part of the Yakati River watershed, finds itself embraced by majestic mountainous terrain, creating a truly awe-inspiring setting.

While the Lake Kurumoi Rainbowfish once flourished in its native habitat, it is with heavy hearts that we acknowledge the challenges it faces today. Habitat loss poses a significant threat to the delicate balance of this unique ecosystem. Tragically, the survival of the wild population hangs in the balance, with uncertain reports suggesting its possible extirpation from its once-teeming native range.

As custodians of the aquatic world, we must remain vigilant in our efforts to protect and preserve these fragile ecosystems. By raising awareness, supporting conservation initiatives, and promoting responsible stewardship, we can forge a path towards a brighter future for the Lake Kurumoi Rainbowfish and other threatened species.

Let us unite in our commitment to safeguard our planet's biodiversity, ensuring that future generations may witness the splendour of these remarkable aquatic treasures that once graced the waters of Lake Kurumoi.

How to breed the Lake Kurumoi Rainbowfish

Limited information is available on the specific breeding process of Lake Kurumoi Rainbowfish; however, it is likely to follow a similar pattern observed in other Melanotaenia species.

To initiate breeding, it is recommended to set up a separate breeding aquarium of sufficient size. This tank should be equipped with a small air-driven sponge filter to provide gentle circulation and filtration. Conditioning a group of three females and two males is crucial before transferring them to the breeding aquarium. In addition, it is advisable to furnish the breeding tank with ample fine-leaved plants or clumps of Java moss, creating suitable spawning sites.

The breeding behaviour of Lake Kurumoi Rainbowfish typically involves a male displaying to a female, followed by the male guiding the female over the plants or throughout the tank. During this process, the female will release a few relatively large eggs at a time, scattering them over the plants. As a result, Lake Kurumoi Rainbowfish are known as "continual spawners," which means that spawning activities occur over several days. This can pose a challenge for aquarists, as some adult fish may consume the eggs as they are scattered. However, ensuring the adult fish are well-fed can help mitigate this issue.

Aquarists have discovered that the eggs of Lake Kurumoi Rainbowfish exhibit remarkable resilience. Many have successfully siphoned the eggs into another aquarium with matching water conditions from the spawning tank. Another effective method is using spawning mops, which can be placed in a separate tank once a significant number of eggs have been collected, allowing for replacing the mop with a fresh one to accommodate the deposition of subsequent batches of eggs.

The eggs of Lake Kurumoi Rainbowfish usually hatch within 6-9 days, with the incubation period varying depending on the temperature. Once the fry becomes free-swimming, they can be offered infusoria as their initial food source, gradually transitioning to larger food items as they grow and develop.

Diet & feeding

Providing Lake Kurumoi Rainbowfish with a well-rounded and nutritious diet is crucial for their overall health and vitality in the aquarium. These captivating fish are relatively uncomplicated when it comes to feeding, but it is essential to prioritize a balanced and diverse diet to meet their dietary needs effectively.

Opt for high-quality commercial flake or small pellet foods to form the foundation of their nutritional intake. These serve as an excellent staple diet for Desert Rainbowfish and provide essential nutrients to support their well-being. However, to replicate their natural feeding habits and ensure dietary variety, it is important to supplement their meals with both meaty and vegetable-based foods.

Incorporating meaty foods such as brine shrimp and bloodworms into their diet proves beneficial, as these sources offer crucial proteins and essential nutrients. These animal-based protein sources contribute to the overall nutritional diversity of their diet, promoting optimal health. Additionally, integrating spirulina or algae wafers provides the necessary vegetable matter to fulfil their plant-based nutritional requirements.

By offering a balanced combination of high-quality commercial flakes or pellets, meaty foods, and vegetable matter, aquarists can ensure that their Lake Kurumoi Rainbowfish receive a well-rounded and nutritious diet. Embrace the opportunity to curate a diverse and nourishing feeding regimen, unlocking the full splendour and promoting the overall well-being of these fascinating aquatic inhabitants.

Other Rainbowfish you maybe interested in