Can bichirs live with black neon tetras?

Verdict
No

No. Bichirs and black neon tetras should not share a tank. An adult bichir eats fish that fit in its mouth, and at 1.5 inches black neon tetras do.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Bichir 72–82°Black neon tetra 73–81°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Bichir 6.5–7.5Black neon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Bichir · 12 inBlack neon tetra · 1.5 in0"2"4"6"8"10"12"
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

BichirBlack neon tetra
Temperature72–82 °F73–81 °F
pH6.5–7.55.5–7.5
Adult size12.0 in1.5 in
Minimum tank75 gal15 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietCarnivoreOmnivore

Better tank mates for bichirs

All bichir tank mates

Better tank mates for black neon tetras

All black neon tetra tank mates

Questions

Can bichirs live with black neon tetras?

No. Bichirs and black neon tetras should not share a tank. An adult bichir eats fish that fit in its mouth, and at 1.5 inches black neon tetras do.

What temperature suits both bichirs and black neon tetras?

73–81 °F. Bichirs need 72–82 °F, black neon tetras need 73–81 °F.

What size tank do bichirs and black neon tetras need together?

At least 75 gal, set by the bichir. Add space for each extra fish.