Molly Fish vs Pea Puffer

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

Molly FishPea Puffer
DifficultyBeginnerIntermediate
Adult size3-4 inches1-1.5 inches
Lifespan3-5 years4-5 years
Min tank size20 gallons10 gallons
Water temp72-82°F74-82°F
pH7.0-8.06.5-7.5
TemperamentpeacefulSemi-aggressive; can be nippy, especially among conspecifics; best in species-only tank
Tank matesOther peaceful community fish such as guppies, platies, swordtails, tetras, and corydoras.Best kept alone or with fast, small fish (e.g., danios, rasboras); avoid long-finned or slow fish
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.Carnivorous; requires live foods (snails, bloodworms, brine shrimp) daily; may accept high-quality frozen foods