Melanotaenia praecox
The dwarf neon or neon rainbowfish is a compact Melanotaenia from West Papua, popular for its electric blue sheen and red-orange fins in good condition. Smaller than Boesemani, it suits medium community tanks but still needs a group of six or more and plenty of horizontal swimming room. Peaceful toward similar-sized fish; active feeders. Egg scatterers; fine-leaved plants or mops for spawning; no care of young.
Flake or small pellets; frozen daphnia or brine shrimp; spirulina; small frequent feeds.
Frequency: 1–2× daily
Iridescence shows best with clean water and varied diet.
Native Region: Indonesia (West Papua—Mamberamo region)
Clear streams and vegetated margins.
Planted aquarium with open centre swim lane; gentle to moderate flow.
Activity Level: High
Schooling Size: 6+ recommended
Mid- to upper-water shoaling; males display; keep only with peaceful species.
Difficulty: Moderate
Type: Egg scatterer
Sexual Dimorphism: Males brighter with deeper body; females slimmer and less intense fin colour.
Adhesive eggs in moss; remove adults; fry need infusoria or very fine foods.
Substrate: Either
Plant Safe: Yes
Fine-leaved plants for egg scattering interest.
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