I recently bought a 55 gallon tank for cheap out of the newes paper. I am cleaning it and getting ready to start some fish in it. I am new to this site and I was hoping you guys would have some ideas. I am looking for an agressive fish that has personality. I am pretty sure I only want one show fish that could live in this tank for life. That or possibly some group of piranhas. Any ideas would be great, thanks!