Can pea puffers live with jack dempseys?

Verdict
No

No. Pea puffers and jack dempseys should not share a tank. An adult jack dempsey eats fish that fit in its mouth, and at 1 inches pea puffers do.

Pea pufferPea puffer74–82°F · pH 7–8 Jack DempseyJack Dempsey72–86°F · pH 6.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–82°Pea puffer 74–82°Jack Dempsey 72–86°
The green band is the temperature range both can live in.
456789Both: 7–7.5Pea puffer 7–8Jack Dempsey 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Pea puffer · 1 inJack Dempsey · 10 in0"2"4"6"8"10"
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 pufferJack Dempsey
Temperature74–82 °F72–86 °F
pH7–86.5–7.5
Adult size1.0 in10.0 in
Minimum tank5 gal55 gal
TemperamentAggressiveAggressive
Swims atAll levelsMiddle
GroupAlone or in pairsAlone or in pairs
DietCarnivoreCarnivore

Better tank mates for pea puffers

All pea puffer tank mates

Better tank mates for jack dempseys

All jack dempsey tank mates

Questions

Can pea puffers live with jack dempseys?

No. Pea puffers and jack dempseys should not share a tank. An adult jack dempsey eats fish that fit in its mouth, and at 1 inches pea puffers do.

What temperature suits both pea puffers and jack dempseys?

74–82 °F. Pea puffers need 74–82 °F, jack dempseys need 72–86 °F.

What size tank do pea puffers and jack dempseys need together?

At least 55 gal, set by the jack dempsey. Add space for each extra fish.