out of all brackish and freshwater puffers figs 8 r ones i never kept b4...but i was doing a little research on them from what i have always thought was they're brackish water fishes but after some research today i could be wrong. i check a few forums and websites and this is the info i got that says they're freshwater fishes. they stated that figs 8 were never been recorded caught or seen in brackish waters but in freshwater rivers. they also only breed in fresh water. that leds me to believe were the fo hizzy did we get that they were brackish fish? well i'm gonna do a little testing myself maybe cruel but only 1 way to find out after i rearrange my tanks i will have 2 10 gallons to spare...i will keep one in totally fresh and 1 in brackish and see how they do...n e input and opinions r greatly welcome i wanna get to the bottom of this...i mean here we are telling people that they're brackish fish (including myself) when they thrive better in fresh is just so wrong