A fisherman discovered an overturned dingy boat along a thin peninsula just west of the boat basin. The fisherman said he saw the man's body floating face down.
"It was quite a shock,” Jim Webber said. “It took me a minute to figure out what I was looking at, then I knew it was bad.”
Muskegon police and fire were called to the scene and have confirmed the man is deceased.
Police said the man was 48 and is from the city of Muskegon. His name has not yet been released.
Police said they hope an autopsy will tell them how the man died.