Alex nailed it for me. After I looked it up a bit I see the most similar type would be a bluegill sunfish. I get them in every year around the same time with my comet goldfish shipments. I seem to have 3 males and one female. I actually love the temperament. They are monstrous. Even at their small size they destroy anything put into the tank. And they seem to like the colder temps than my usual 78+. 65° seems to be their favorite. Another note is that they are lightning fast. Zipping from one end of the tank to the other through all the plants and wood with little effort. They are small right now but I want to keep them so I'll have continual updates on their status. I have some supplies and plans for a 500 gallon tank to be setup, and I was thinking it would be grand to have a Texas Native theme with wood, plants, and fish all featuring the beauty of Toledo Bend Texas waters. So far, all talk.