Can bettas live with guppies?

Verdict
Yes, with care

Yes, with care. Bettas and guppies can share a tank, but watch one thing. Male bettas often attack bright, long-finned fish like guppies, mistaking them for rivals.

BettaBetta76–82°F · pH 6.5–7.5 GuppyGuppy72–82°F · pH 6.8–7.8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–82°Betta 76–82°Guppy 72–82°
The green band is the temperature range both can live in.
456789Both: 6.8–7.5Betta 6.5–7.5Guppy 6.8–7.8
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 inGuppy · 2 in0"1"2"3"4"5"6"
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

BettaGuppy
Temperature76–82 °F72–82 °F
pH6.5–7.56.8–7.8
Adult size2.5 in2.0 in
Minimum tank5 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atTopTop
GroupOne per tankGroups of 3+
DietCarnivoreOmnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for guppies

All guppy tank mates

Questions

Can bettas live with guppies?

Yes, with care. Bettas and guppies can share a tank, but watch one thing. Male bettas often attack bright, long-finned fish like guppies, mistaking them for rivals.

What temperature suits both bettas and guppies?

76–82 °F. Bettas need 76–82 °F, guppies need 72–82 °F.

What size tank do bettas and guppies need together?

At least 10 gal, set by the guppy. Add space for each extra fish.