Northern trout gudgeon vs Butterfly splitfin: can they live together?

Verdict: With caution

  • The Northern trout gudgeon can be semi-aggressive or nip fins.
  • The Northern trout gudgeon grows about twice as long as the Butterfly splitfin; watch for bullying or predation.
  • Their temperature ranges only just meet, at 26°C (79°F).
  • A pH of 6.0–7.8 suits both.
  • Minimum tank for the pair: 150 L (40 US gal)

Side by side

Northern trout gudgeonButterfly splitfin
Adult size17.5 cm (6.9 in)8 cm (3.1 in)
Minimum tank150 L (40 US gal)75 L (20 US gal)
Temperature24–26°C (75–79°F)26–32°C (79–90°F)
pH6.0–7.86.0–8.0
Hardness–9–19 dGH (161–339 ppm)
TemperamentSemi-aggressivePeaceful
Community tankGoodGood
Care levelEasyEasy
DietOmnivoreOmnivore

Species profiles