i went to my cousins house earlier and on the way i saw this fish market, in there i saw a grouper, very much alive and lively. i was surprised when they told me that it swims on freshwater. now my question is can groupers really tolerate freshwater? it was pretty cheap at around $15 converted from our peso here in the philippines. i resisted the urge to buy because i lack proper knowledge about them. this is how it exactly looks like.