Can rainbow sharks live with boesemani rainbowfish?

Verdict
Yes

Yes. Rainbow sharks and boesemani rainbowfish make a good pair. Both are fine at 75–80°F. Plan on at least 55 gal.

Rainbow sharkRainbow shark72–80°F · pH 6.5–7.5 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Rainbow shark 72–80°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Rainbow shark 6.5–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Rainbow shark · 6 inBoesemani rainbowfish · 4 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 sharkBoesemani rainbowfish
Temperature72–80 °F75–82 °F
pH6.5–7.57–8
Adult size6.0 in4.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupOne per tankGroups of 6+
DietOmnivoreOmnivore

Better tank mates for rainbow sharks

All rainbow shark tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can rainbow sharks live with boesemani rainbowfish?

Yes. Rainbow sharks and boesemani rainbowfish make a good pair. Both are fine at 75–80°F. Plan on at least 55 gal.

What temperature suits both rainbow sharks and boesemani rainbowfish?

75–80 °F. Rainbow sharks need 72–80 °F, boesemani rainbowfish need 75–82 °F.

What size tank do rainbow sharks and boesemani rainbowfish need together?

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