Subscribe | UPI Odd Newsletter Subscribe Dec. 27 (UPI) -- A tourist walking on a Wisconsin beach captured video of something unusual in Lake Michigan that she said might have been a shark. Carlin Hastings said she was visiting Milwaukee for the holidays when she captured video around 2:40 p.m. Friday that appears to show a shark-like shape in the water at McKinley Beach. Advertisement She said the big fish in her video, which she posted to Facebook, had a dorsal fin like a shark. "Everyone I showed it to said it looked like a shark," Hastings told WISN-TV. Wisconsin Department of Natural Resources spokeswoman Cheryl Masterson said the video isn't clear enough to make a positive identification of the creature. "I can't say definitively what it is," she said. Masterson suggested the suspected "shark" may have been an unusually large sturgeon or a chinook salmon. Read More California surfer films uncomfortably close call with great white shark Shark's bite on snorkeling honeymooner caught on camera Diver's close call with great white shark caught on camera