Mountain rainbowfish vs Yellowbelly gudgeon: can they live together?

Verdict: With caution

  • The Yellowbelly gudgeon is best kept in a species tank.
  • The Mountain rainbowfish grows about twice as long as the Yellowbelly gudgeon; watch for bullying or predation.
  • Both are comfortable at 21–22°C (70–72°F).
  • A pH of 6.5–7.0 suits both.
  • Minimum tank for the pair: 210 L (55 US gal)

Side by side

Mountain rainbowfishYellowbelly gudgeon
Adult size10 cm (3.9 in)4.5 cm (1.8 in)
Minimum tank210 L (55 US gal)55 L (15 US gal)
Temperature18–22°C (64–72°F)21–26°C (70–79°F)
pH6.5–7.25.5–7.0
Hardness–2–5 dGH (36–89 ppm)
TemperamentPeacefulPeaceful
Community tankWith cautionNot suitable
Care levelEasyDifficult
DietOmnivoreOmnivore

Species profiles