Can pea puffers live with mollies?

Verdict

Yes, with care

Yes, with care. Pea puffers and mollies can share a tank, but watch one thing. Pea puffers are aggressive, though mollies are big enough to shrug most of it off.

Pea puffer74–82°F · pH 7–8

Molly72–82°F · pH 7.5–8.5

What to watch

Watch outPea puffers are aggressive, though mollies are big enough to shrug most of it off.

What works

Both are fine at 74–82°F.
pH 7.5–8 suits both.

Water side by side

The green band is the temperature range both can live in.

The green band is the pH both tolerate.

Size to scale

Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

	Pea puffer	Molly
Temperature	74–82 °F	72–82 °F
pH	7–8	7.5–8.5
Adult size	1.0 in	4.0 in
Minimum tank	5 gal	20 gal
Temperament	Aggressive	Peaceful
Swims at	All levels	Top
Group	Alone or in pairs	Groups of 3+
Diet	Carnivore	Omnivore

Better tank mates for pea puffers

CrayfishYes

All pea puffer tank mates

Better tank mates for mollies

All molly tank mates

Questions

Can pea puffers live with mollies?

Yes, with care. Pea puffers and mollies can share a tank, but watch one thing. Pea puffers are aggressive, though mollies are big enough to shrug most of it off.

What temperature suits both pea puffers and mollies?

74–82 °F. Pea puffers need 74–82 °F, mollies need 72–82 °F.

What size tank do pea puffers and mollies need together?

At least 20 gal, set by the molly. Add space for each extra fish.