yes you are correct...combined total is 5,
but limit of salmon(chinook, coho) is 5,
rainbow is 2, laker's 3, on lake Ontario, so if you thought they were all lakers and kept 3 and they were trout ...you are over your limit and would get charged....same if you thought they were salmon.
other day when I had double header...I never saw the fish my friend landed....he said it was small chinook and thru it in the cooler....I landed a 10 lb bow and he boxed it as I was driving.....we then had another double header of bows....then things slowed down...so we decided to take pictures and discovered his "salmon " was a bow and we were at our rainbow trout limit.....minutes later had another double of bows which we released....then changed depth and then got a couple coho.... you never want to misjudge your species as it could get you into trouble.