Here's a link on how to clean a chain pickerel. It's kinda the opposite of how I learned to do it, but I tried it and it works great. https://www.youtube.com/watch?v=qjcelLOjh1E

Here's the other way, that I'm more familiar with. This is a northern pike, but they're anatomically identical as far as bone structure. https://www.youtube.com/watch?v=IGJhLfWLRx8

I'm telling you, don't throw these guys back. They are first class table fare. Not oily at all, flaky, perfect for cooking any way.