So in my atlas of freshwater fish they list an Immaculate puffer. I've looked online and it seems they are only marine. Anyone ever kept one in fresh or heard of it before?
From what I understand they are tolerant of brackish water not unlike many of the other arothron species. Not able to survive in complete freshwater though.
^ there are a few that live in high end brackish such as the Green Spotted Puffer & Ceylon Puffer, and one that i know of that lives in low end brackish the Figure 8 Puffer...
Just depends on what your looking for... other wise, you could always go completely Freshwater...