Update:
The Florida Fish and Wildlife Conservation says Mark Kocher, 60, of Fort Myers Beach has died after he was found unresponsive near an overturned kayak.
WATCH:Law enforcement recovers abandoned kayak off Sanibel:
Kayaker dies after incident near Sanibel Causeway
According to multiple agencies, Kocher was found unresponsive in the water near an overturned kayak just outside of the Sanibel Causeway…