Howdy,
I doubt that any "regular" fish can make it. Some morays will be all right, which are sold for freshwater as juveniles but need saltwater later on. You could go brackish and many mollies and archers will be fine. First of all, though, you need to look into the new equipment you will need, perhaps protein skimmer etc. This is a big undertaking, requiring some thorough research beforehand. Your LFS might be of good help, too.
HarleyK
BTW: please don't use all caps. It's considered shouting in the online community .... and it's harder to read