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Maximum size : 6 cm

Dwarf Neon Rainbowfish - Melanotaenia praecox : Complete Fish Profile & Care Guide

The Neon Dwarf Rainbowfish (Melanotaenia praecox), while not particularly demanding, are not ideal for novice aquarists or newly established tanks as they are sensitive to stress. However, these charming fish are sure to make a delightful addition to any experienced hobbyist's aquarium. A vibrant shoal of iridescent Neon Dwarf Rainbowfish in a well-planted community aquarium presents a spectacular and captivating visual display. It is recommended to keep these fish in groups of no fewer than six individuals, as they significantly enhance the dynamism and chromatic richness of the aquarium's upper and middle strata.

These tranquil beings are suitable companions for a wide range of species and pose no threat to aquatic plants, rendering them an exemplary choice for community aquariums. Neon Dwarf Rainbowfish harmonize effectively with other gentle species, including Tetras, Rasboras, and Dwarf Cichlids. It is advisable to refrain from placing them with larger, more aggressive fish to prevent any undue stress on the Rainbowfish.

The aquarium housing Neon Dwarf Rainbowfish should measure at least 3 feet in length to provide ample space. It is advisable to landscape the sides and rear with aquatic plants and bogwood, crafting a complex of hiding spots for the fish to investigate. This arrangement should preserve a spacious open area in the center for swimming. Additionally, incorporating floating plants will effectively soften intense lighting, creating a more natural and comfortable environment for the fish. As these fish have a propensity to jump, it is essential to have a tightly covered tank.

The Neon Dwarf Rainbowfish possess an elongated body, striking big eyes, and a greyish-pink body colour that appears iridescent with the reflection of light, creating a stunning display of blue tones ranging from lavender to teal. Their twin dorsal fins are also brightly coloured and add to their overall beauty. With their captivating appearance and active personalities, the Dwarf Rainbowfish are a delightful addition to any aquarium.

Dwarf Neon Rainbowfish Photos

Sexual Dimorphism

Determining the sex of the Neon Dwarf Rainbowfish is a straightforward and uncomplicated task. Males can be easily distinguished from their female counterparts based on their larger size and more vivid colouration, as well as a significantly deeper body as they mature. Males exhibit a striking red hue along the edges of their fins, while the female fins display a contrasting orange-to-yellow edge. Furthermore, females tend to have a silver appearance compared to males' vibrant colours.

Male Female

Quick Facts

Scientific Name	Melanotaenia praecox
Year Described	1922
Other Names	Neon Rainbowfish, Dwarf Rainbowfish, Peacock Rainbowfish, Praecox Rainbowfish, Diamond Rainbowfish,
Kingdom	Animalia
Classification	Actinopterygii
Order	Atheriniformes
Family	Melanotaeniidae
Genus	Melanotaenia
Origins	Papua New Guinea , Indonesia
Max Size	6 cm
Temperament	Peaceful
Aquarium Level	Middle
Difficulty	Beginner - Intermediate
Shoaling	Yes
Best kept as	Groups 6+
Diet & Feeding	Omnivore
Reproduction	Egg-Scatterer
Average Lifespan	Up to 4 Years

Water Parameters

Water Type	Freshwater
pH	6.5 - 7.5
GH	5 - 15

Ideal Temperature
℉	72 - 79
℃	22 - 26

Natural Habitat

Neon Dwarf Rainbowfish inhabit the verdant stream environments of the Mamberamo region in Western New Guinea, Southeast Asia. These splendid specimens thrive in the rapid, transparent, soft, and acidic waters adjacent to the main river channel. Additionally, they are found in the encompassing marshes and swamps. Their preferred habitats are characterized by abundant aquatic vegetation, alongside submerged logs and roots, offering them ample shelter and feeding opportunities.

Breeding

Breeding the Neon Dwarf Rainbowfish is a relatively straightforward process, but successfully raising the fry requires careful attention and effort. To begin, a separate breeding tank that is heavily planted with fine-leaved plants or Spawning mops should be set up. The temperature of the water should be raised a few degrees above average, and the water should be slightly hard with some alkalinity. A small air-powered filter is advisable to provide adequate flow and oxygenation.

Before breeding, it is important to condition the fish with protein-rich frozen or live foods for at least two weeks to stimulate their reproductive cycles. As the breeding season approaches, males will begin to display courtship behaviours, and females will become noticeably plumper. Selecting the healthiest and best-coloured fish, they should be transferred to the breeding tank to begin spawning. During spawning, the male will lead the female to a spawning area, where she will lay groups of eggs that the male will fertilize. This process will continue until the female has exhausted all her eggs.

It is advisable to remove the eggs from the breeding tank every day and place them into a separate grow-out tank to prevent predation by the parents. After seven to ten days, the eggs will hatch into fry, and they will need to be fed tiny invertebrates for about a week until they are able to eat foods such as brine shrimp or nauplii. With attentive care and optimal conditions, raising healthy and robust fry can be achieved.

Diet & Feeding

The Neon Dwarf Rainbowfish exhibit an adaptable palate, and their feeding preferences are not overly selective. For optimal health and well-being, it is recommended to incorporate high-quality micropellets, flakes, granules, and green flakes as the primary sources of their diet. Additionally, frequent feedings of frozen or freeze-dried food, such as bloodworm, daphnia, mosquito larvae, brine shrimp, and tubifex, will contribute to the fish's overall health and enhance their vibrant colouration.

Videos

Other Rainbowfish