Can rainbow sharks live with plecos?

Verdict

Yes, with care

Yes, with care. Rainbow sharks and plecos can share a tank, but watch one thing. Both claim territory on the bottom. Give each its own cave and plenty of floor space.

Rainbow shark72–80°F · pH 6.5–7.5

Common pleco72–86°F · pH 6.5–7.5

What to watch

Watch outBoth claim territory on the bottom. Give each its own cave and plenty of floor space.
Watch outRainbow sharks chase other bottom fish out of their patch.

What works

Both are fine at 72–80°F.
pH 6.5–7.5 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

	Rainbow shark	Common pleco
Temperature	72–80 °F	72–86 °F
pH	6.5–7.5	6.5–7.5
Adult size	6.0 in	15.0 in
Minimum tank	55 gal	125 gal
Temperament	Semi-aggressive	Peaceful
Swims at	Bottom	Bottom
Group	One per tank	Alone or in pairs
Diet	Omnivore	Herbivore

Better tank mates for rainbow sharks

All rainbow shark tank mates

Better tank mates for plecos

All common pleco tank mates

Questions

Can rainbow sharks live with plecos?

Yes, with care. Rainbow sharks and plecos can share a tank, but watch one thing. Both claim territory on the bottom. Give each its own cave and plenty of floor space.

What temperature suits both rainbow sharks and plecos?

72–80 °F. Rainbow sharks need 72–80 °F, plecos need 72–86 °F.

What size tank do rainbow sharks and plecos need together?

At least 125 gal, set by the common pleco. Add space for each extra fish.