Thanks Louie! I can't wait for it to grow and really get its pattern in. I took those pics a day after I got it, so the pattern should come out even more as it settles in and I'll get more pics.
I'm feeding it guppies outta my feeder colony at the moment. Only thing small enough for it to eat.
Caribemob, bass and sunfish are usually pretty aggressive. Rock bass and Green Sunfish are good if you want something aggressive. You're really not going to find anything in the world of natives to compete with your piranhas though... Gar are your best bet there, but if you only have a 75, those aren't really an option...
And i can't really think of anything native that are "toothy" aside from trout, and those are not something to be kept in a tank. They require a very large area to swim, current, and a chiller.
Walleye have teeth, but I havn't really heard of people having success with them in tanks, and they get very large, will need over a 75gal