2 men fishing where the St. Lawrence meets Lake Ontario received quite the shock this week when it appeared that a possible shark snagged one of their lines!

The supposed shark is only visible above water for a few seconds. Some experts who have looked at the video say it may be a bull shark, which have been known to prowl rivers and lakes and have been spotted before in Lake Michigan. However, skeptics say the fish could have also been a large catfish or a sturgeon. Watch the video below and form your own opinion.

Thumbnail photo taken from the YouTube video here.