I've attached a pdf with photos of the 3 principle type of muskies - barred, spotted, and clear. This muskie might be a cross between the spotted and "clear". They're both present in the great lakes so it is possible. I think most Niagara River muskies are barred.
Thanks, Tony. I'll send him the pdf.
He was fishing in the Thompson's Hole area when he got it. He's a perch & walleye guy, & occasionally steelhead, but definitely wasn't trolling for muskies
Could it be in transition from yearling to juvenile?