Drat! I know that fish! From when I was a kid, and I cannot summon the name well enough to track it down. AAAAARRRRGH!
I am going to feel so stupid when someone comes up with this.
Well, with the tiny scales and the long dorsal and the forward position of the pelvic fins, I was looking at cod or southern cod or some sort (think not less of me that I don't gop look up the latin just now) that's probably way off, but the first thing that popped into my head when I saw that was "That looks like a young tomcod. But it couldn't be."