Haha, the girlfriend decided to name him Cheetah, pretty ironic if you ask meYeah, I agree it seems to be a male. I had friend who had a male Jaguar and this fish looks similar to how he looked when at his smaller size, so it most likely is a male from what I've seen. I don't know why, but for possible names maybe Tim? When I looked at him and was faced with the question that's what came to mind....