Puffer Fish

[dollsteak]

I heard that they need a mix of freshwater and saltwater to survive, is there such a thing as just freshwater puffer fish?

 

[OrangeCones]

The Dwarf Freshwater Puffer is 100% freshwater. I believe there are two official species named:

Carinotetraodon travancoricus
Carinotetraodon imitator

I've only kept the first one.