Mosquitofish vs Molly: can they live together?

Verdict: With caution

The Mosquitofish can be semi-aggressive or nip fins.
The Molly grows about twice as long as the Mosquitofish; watch for bullying or predation.
Both are comfortable at 21–26°C (70–79°F).
A pH of 7.5–8.0 suits both.
Minimum tank for the pair: 40 L (11 US gal)

Side by side

	Mosquitofish	Molly
Adult size	4 cm (1.6 in)	10 cm (3.9 in)
Minimum tank	40 L (11 US gal)	–
Temperature	12–29°C (54–84°F)	21–26°C (70–79°F)
pH	6.0–8.0	7.5–8.2
Hardness	5–19 dGH (89–339 ppm)	11–30 dGH (196–535 ppm)
Temperament	Semi-aggressive	Peaceful
Community tank	Good	–
Care level	Easy	Easy
Diet	Omnivore	Omnivore