Molly Fish vs Swordtail

Side-by-side care comparison to help you choose.

Molly FishSwordtail
DifficultyBeginnerBeginner
Adult size3-4 inches4-5 inches
Lifespan3-5 years3-5 years
Min tank size20 gallons20 gallons
Water temp72-82°F72-82°F
pH7.0-8.07.0-8.0
Temperamentpeacefulpeaceful
Tank matesOther peaceful community fish such as guppies, platies, swordtails, tetras, and corydoras.Peaceful community fish like mollies, platies, tetras, corydoras.
DietOmnivore; feed high-quality flake or pellet daily, supplement with algae wafers, spirulina, blanched vegetables, and occasional live/frozen foods like brine shrimp or bloodworms.Omnivore; feed high-quality flake or pellet daily, supplement with frozen or live foods like brine shrimp and daphnia 2-3 times per week.