Can bettas live with rainbow sharks?

Verdict

Yes, with care

Yes, with care. Bettas and rainbow sharks can share a tank, but watch one thing. Rainbow sharks are much bigger and pushier than bettas, which are slow and easy to bully at feeding time.

Betta76–82°F · pH 6.5–7.5

Rainbow shark72–80°F · pH 6.5–7.5

What to watch

Watch outRainbow sharks are much bigger and pushier than bettas, which are slow and easy to bully at feeding time.

What works

Both are fine at 76–80°F.
pH 6.5–7.5 suits both.
They use different parts of the tank: bettas the top, rainbow sharks the bottom.

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

	Betta	Rainbow shark
Temperature	76–82 °F	72–80 °F
pH	6.5–7.5	6.5–7.5
Adult size	2.5 in	6.0 in
Minimum tank	5 gal	55 gal
Temperament	Semi-aggressive	Semi-aggressive
Swims at	Top	Bottom
Group	One per tank	One per tank
Diet	Carnivore	Omnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for rainbow sharks

All rainbow shark tank mates

Questions

Can bettas live with rainbow sharks?

Yes, with care. Bettas and rainbow sharks can share a tank, but watch one thing. Rainbow sharks are much bigger and pushier than bettas, which are slow and easy to bully at feeding time.

What temperature suits both bettas and rainbow sharks?

76–80 °F. Bettas need 76–82 °F, rainbow sharks need 72–80 °F.

What size tank do bettas and rainbow sharks need together?

At least 55 gal, set by the rainbow shark. Add space for each extra fish.