HomeCompare fishJavanese ricefish vs Murray river rainbowfish Javanese ricefish vs Murray river rainbowfish: can they live together? Verdict: With cautionThe Murray river rainbowfish grows about twice as long as the Javanese ricefish; watch for bullying or predation.Their preferred pH ranges don't overlap.Both are comfortable at 20–22°C (68–72°F).Minimum tank for the pair: 150 L (40 US gal)Side by sideJavanese ricefishMurray river rainbowfishAdult size4.5 cm (1.8 in)9 cm (3.5 in)Minimum tank75 L (20 US gal)150 L (40 US gal)Temperature20–24°C (68–75°F)18–22°C (64–72°F)pH7.5–8.56.5–7.2Hardness2–10 dGH (36–178 ppm)–TemperamentPeacefulPeacefulCommunity tankWith cautionWith cautionCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesJavanese ricefishOryzias javanicusMurray river rainbowfishMelanotaenia fluviatilis