Javanese Ricefish
Oryzias javanicus
The Javanese Ricefish (Oryzias javanicus) is a peaceful fish that's rewarding to keep. Give it a tank of at least 40 litres (11 US gallons), water held at 75-84°F, and a pH of 6.5-7.5.
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
A tank of at least 40 litres (11 US gallons) works well. Keep the water at 75-84°F with a pH around 6.5-7.5, and set up both cover and open swimming space where they spend most of their time (Mid).
What Do Javanese Ricefish Eat?
They're not fussy eaters - feed a varied diet, rotating good-quality dry, frozen, and gel foods rather than the same thing every day, and match the food size to their mouths.
Javanese Ricefish Tank Mates
The Javanese Ricefish is peaceful, which is the first thing to weigh up when you choose tank mates. Good matches come down to the whole stocking list working together - temperature, tank size, and temperament - not any single label. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Javanese Ricefish Good for Beginners?
Care demand varies by line and setup. Match the care level to how often you actually test and change water.
Javanese Ricefish - frequently asked questions
What size tank do Javanese Ricefish need?
Javanese Ricefish need a tank of at least 40 litres (11 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
What water parameters do Javanese Ricefish need?
Keep them at 75-84°F with a pH of 6.5-7.5, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Javanese Ricefish eat?
Javanese Ricefish are omnivores and aren't fussy eaters. Feed a varied mix of good-quality dry, frozen, and gel foods, and match the food size to their mouths. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Javanese Ricefish good for beginners?
It depends on the setup. Match Javanese Ricefish to how often you actually test water and perform maintenance.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Fish to avoid mixing with Javanese Ricefish
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- Pea PufferPredator - Pea Puffer will eat or injure smaller tank mates
- Betta (Male)Predator - Betta (Male) will eat or injure smaller tank mates
