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TankMinded

Can Betta Fish Live With Figure Eight Puffer?

By Alex WalshLast reviewed Apr 18, 2026
No

No, figure-eight puffers are 3-inch brackish aggressive fish that nip at the fins of every tankmate.

Why

Minimum shared tank
15 gallons
Shared temperature range
76-82°F

What could go wrong

The figure-eight puffer nips the betta's fins repeatedly until they are shredded or the betta dies from infection.

If you keep them in separate tanks

Sized for the 15 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.

AquaClear 30 Power Filter

Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 15 gallon minimum.

Eheim Jager 150W Thermostat Heater

Holds a steady temperature inside the 76-82°F window both species need.

API Freshwater Master Test Kit

Keep ammonia, nitrite, and nitrate in check. Two-species tanks have more bioload and less margin for error than single-species setups.

Better pairings to consider

Figure-eight puffers do well with large brackish tankmates like archerfish or scats. Bettas do well in freshwater with snails and peaceful community fish.

Related compatibility questions

Keep reading

Planning a community tank?

Check compatibility for any two freshwater species before you buy. Stop guessing, stop returning fish.

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Frequently Asked Questions