MEMBERS OF the COAST GUARD SPENT THE BETTER PART OF TODAY SEARCHING FOR A FISHERMAN, WHO IS BELIEVED TO HAVE FALLEN OFF A BOAT IN the MONTEREY BAY THIS MORNING. HE WAS LAST SEEN AROUND 6:30 THIS MORNING ON A 43-FOOT BOAT REGISTERED TO THE MONTEREY HARBOR. The BOAT WAS ABOUT 9 MILES SOUTH OF MOSS LANDING WHEN THE BOAT ROLLED, AND THE FISHERMAN FELL OVERBOARD.