caught a moderate size northern this weekend. measured it but didnt keep it. like an idiot, i didnt measure girth. it was 37 inches in length, and its girth is what i would say was "slightly skinnier than average". how much does this fish weigh? i have a 38 incher on my wall that is 18lbs, but is a somewhat fat fish. ive caught and weighed a 36 inch northern before releasing it and that fish only weighed 6.5 lbs!! i realize its hard to estimate without girth, but tell me what you think.