Rainbowfish Care Sheet
Melanotaeniidae spp.
Stunning, active fish that display iridescent colors that shift with the light. Rainbowfish are peaceful schooling fish that make spectacular community tank centerpieces.
72–82°F
6.5–8
30 gallons
5–8 years
2–6 inches (5–15 cm) depending on species
6+ (schooling fish that display best colors in groups)
Easy-moderate. Egg scatterers that attach eggs to fine-leaved plants or spawning mops. Continuous spawners over days/weeks.
Diet & Feeding
Omnivore — flakes, pellets, frozen foods, live foods, color-enhancing foods. Feed varied diet for best coloration.
Natural Habitat
Native to Australia, New Guinea, and Southeast Asia. Found in streams, rivers, and lakes with clear water.
Care Tips
Colors intensify as they mature — young fish look dull; give them 6-12 months
Morning light triggers their best color displays — watch them 'flash'
Active swimmers that need a longer tank (4 feet+) for larger species
Peaceful with everything their size or larger
Males are more colorful; keep at least 2 females per male