Slim betta vs Mosquitofish: can they live together?

Verdict: With caution

  • The Mosquitofish can be semi-aggressive or nip fins.
  • The Slim betta can be semi-aggressive or nip fins.
  • The Slim betta grows about twice as long as the Mosquitofish; watch for bullying or predation.
  • Both are comfortable at 24–29°C (75–84°F).
  • A pH of 6.5–7.5 suits both.
  • Minimum tank for the pair: 75 L (20 US gal)

Side by side

Slim bettaMosquitofish
Adult size10 cm (3.9 in)4 cm (1.6 in)
Minimum tank75 L (20 US gal)40 L (11 US gal)
Temperature24–30°C (75–86°F)12–29°C (54–84°F)
pH6.5–7.56.0–8.0
Hardness5–15 dGH (89–268 ppm)5–19 dGH (89–339 ppm)
TemperamentSemi-aggressiveSemi-aggressive
Community tankGoodGood
Care levelEasyEasy
DietOmnivoreOmnivore

Species profiles