that pic is from wikipedia.I don't actually have any of the pumkinseed yet, but I've got cousins-bluegill and longears.
interesting fish. active, inquisitive.
bluegill can get too big for your tank, but you could go with longears here's some soso pics of mine. probably with 5 of them though, to spread out aggression. unless you just wanted to go one.they're feisty.
I thought they looked kinda like a badass bluegill hhaha but ive decided to go with a breeding pair project. Not only is it beautiful to watch, it helps the fish pay for themselves =)