Manitoulan OPP are investigating the death of a woman who fell into Lake Huron from a ferry as it travelled from South Baymouth to Tobermory.
Police say they responded to a person overboard call late Friday night.
They say the body was recovered with the help of the Canadian Coast Guard and the Manitoulin O-P-P Marine unit.
Investigators say the death is not considered suspicious.
The name of the deceased was not immediately released.