“Toothy predators’’ on the Chicago lakefront doubled down for me last week. Northern pike and muskies. First Marcus Benesch, who sends fishing reports for the Des Plaines River, had an aside about guys fishing smallmouth bass on the lakefront, “A buddy of mine hooked into a uppers 30s [inches] musky at Burnham Harbor, with no way of landing it, it bit off at the wall.“A lot of guys started chit chatting and it turns out there has been a pair of muskies that have been spotted a few times in the shallows at Burnham. What’s going on? Some secret stocking or just rogue urban muskies?’’Fair questions. (Plus I like the phrase, “rogue urban muskies.’’) On Friday, noted smallmouth fisherman, jig-maker and skateboarder Ryan Whitacre, texted, “Just counted [seven] decent-sized pike at [a lakefront harbor].