I think that one is some kind of sunfish, I swear I've seen a pic of it before...and of course I can't find my Florida field guide to check. If it's the one I'm thinking of it doesn't get big, not as big as a normal pumpkinseed or bluegill - but bigger than the pigmy sunfish. Also agree that the 3rd one looks like a dace. The 2nd one I have no clue, almost looks like a livebearer but really that's a guess.