Can rainbow sharks live with blue gouramis?

Verdict
Yes

Yes, rainbow sharks and blue gouramis can live together. Both are fine at 72–80°F. Plan on at least 55 gal.

Rainbow sharkRainbow shark72–80°F · pH 6.5–7.5 Blue gouramiBlue gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–80°Rainbow shark 72–80°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Rainbow shark 6.5–7.5Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Rainbow shark · 6 inBlue gourami · 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 sharkBlue gourami
Temperature72–80 °F72–82 °F
pH6.5–7.56–8
Adult size6.0 in5.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomTop
GroupOne per tankAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for rainbow sharks

All rainbow shark tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can rainbow sharks live with blue gouramis?

Yes, rainbow sharks and blue gouramis can live together. Both are fine at 72–80°F. Plan on at least 55 gal.

What temperature suits both rainbow sharks and blue gouramis?

72–80 °F. Rainbow sharks need 72–80 °F, blue gouramis need 72–82 °F.

What size tank do rainbow sharks and blue gouramis need together?

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