Can paradise fish live with hatchetfish?

Verdict
Yes

Yes. Paradise fish and hatchetfish make a good pair. Both are fine at 75–79°F. Plan on at least 20 gal.

Paradise fishParadise fish61–79°F · pH 6–8 HatchetfishHatchetfish75–81°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Paradise fish 61–79°Hatchetfish 75–81°
The green band is the temperature range both can live in.
456789Both: 6–7.5Paradise fish 6–8Hatchetfish 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Paradise fish · 3.5 inHatchetfish · 1.5 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

Paradise fishHatchetfish
Temperature61–79 °F75–81 °F
pH6–85.5–7.5
Adult size3.5 in1.5 in
Minimum tank20 gal20 gal
TemperamentSemi-aggressivePeaceful
Swims atTopTop
GroupOne per tankGroups of 6+
DietOmnivoreCarnivore

Better tank mates for paradise fish

All paradise fish tank mates

Better tank mates for hatchetfish

All hatchetfish tank mates

Questions

Can paradise fish live with hatchetfish?

Yes. Paradise fish and hatchetfish make a good pair. Both are fine at 75–79°F. Plan on at least 20 gal.

What temperature suits both paradise fish and hatchetfish?

75–79 °F. Paradise fish need 61–79 °F, hatchetfish need 75–81 °F.

What size tank do paradise fish and hatchetfish need together?

At least 20 gal, set by the paradise fish. Add space for each extra fish.