Javanese Ricefish
Oryzias javanicus
Javanese Ricefish (Oryzias javanicus) — Varies care, Peaceful, under Other. Minimum tank in the app: 10.6 US gal min; aim for 75–84°F and pH 6.5–7.5. The Javanese Ricefish appeals to aquarists looking for a small, semi-aggressive species that adds unique movement to mid-water zones.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Asia
- East & Southeast Asia
Regional colours match the stocking calculator’s origin map.
Javanese Ricefish Tank Setup
Create a balanced environment with ample mid-water space complemented by floating plants or structures for cover. A gentle flow mimics their natural habitat, while a substrate that allows for foraging will enhance their feeding experience. Moderate lighting can encourage natural behaviors and reduce stress, ensuring hiding spots are available without overwhelming the visual space.
What Do Javanese Ricefishs Eat?
As omnivores, Javanese Ricefish are quick feeders and may compete for food, especially if pellets or flakes are offered. Providing a varied diet that includes live or frozen foods can enhance their coloration and vitality, but ensure food reaches all fish by using sinking options or scattering food throughout the tank to reduce competition intensity.
Javanese Ricefish Tank Mates
Ideal companions include similarly sized fish with compatible temperaments, such as small tetras or rasboras. Avoid larger or overly boisterous species that could stress the Ricefish or provoke aggressive displays. When kept together, maintain sufficient space to mitigate intraspecies conflicts, as this species doesn't shoal in the traditional sense but can become territorial.
Are Javanese Ricefishs Good for Beginners?
Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often underestimate the importance of tank structure, leading to increased aggression and stress. Failing to provide adequate cover or space can result in bullying or territorial disputes.
Building a community? Run the full list through the stocking calculator before you add anything else.
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