Can rainbow sharks live with paradise fish?

Verdict
Yes

Yes, rainbow sharks and paradise fish can live together. Both are fine at 72–79°F. Plan on at least 55 gal.

Rainbow sharkRainbow shark72–80°F · pH 6.5–7.5 Paradise fishParadise fish61–79°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Rainbow shark 72–80°Paradise fish 61–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Rainbow shark 6.5–7.5Paradise fish 6–8
The green band is the pH both tolerate.

Size to scale

Rainbow shark · 6 inParadise fish · 3.5 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

Rainbow sharkParadise fish
Temperature72–80 °F61–79 °F
pH6.5–7.56–8
Adult size6.0 in3.5 in
Minimum tank55 gal20 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomTop
GroupOne per tankOne per tank
DietOmnivoreOmnivore

Better tank mates for rainbow sharks

All rainbow shark tank mates

Better tank mates for paradise fish

All paradise fish tank mates

Questions

Can rainbow sharks live with paradise fish?

Yes, rainbow sharks and paradise fish can live together. Both are fine at 72–79°F. Plan on at least 55 gal.

What temperature suits both rainbow sharks and paradise fish?

72–79 °F. Rainbow sharks need 72–80 °F, paradise fish need 61–79 °F.

What size tank do rainbow sharks and paradise fish need together?

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