It looks like some kind of sea Robin
I'm no expert on these, but a quick google search makes it seem to me like a dark colored bighead searobin
2017 Undisputed Iowa Small Drum and Creek Chub Champion
That's great to hear, that's what I was thinking to due to the markings on the fins and stripes on the back.
I don't have a frickin clue what it is, but it's cool.