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TankMinded

Can Betta Fish Live With Iridescent Shark?

By Alex WalshLast reviewed Apr 18, 2026
No

No, iridescent sharks grow to 36-48 inches and are pond-scale fish that will eat bettas.

Why

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

What could go wrong

The iridescent shark either eats the betta or injures itself panicking against tank walls, both outcomes are harmful.

If you keep them in separate tanks

Sized for the 300 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.

Fluval 307 Performance Canister Filter

Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 300 gallon minimum.

Eheim Jager 300W 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

Bettas do well in species tanks or peaceful communities. Iridescent sharks need a pond or very large species tank with other large peaceful 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