Where the mouth of the Caloosahatchee River transitions into San Carlos Bay, Roy Kibbee pulls up crab traps in January, about two weeks after the U.S. Army Corps of Engineers stopped dumping huge volumes of Lake Okeechobee’s polluted water into the river. Kibbee said crabs flee the bay when the Army Corps opens the spillway. The lake waters turn the river dark and dilute the estuary’s salinity. Degrading water quality has taken a toll on Kibbee’s crabbing business. In healthier times, Kibbee operated four crabbing boats with a crew of two men. Now he works alone, sometimes barely covering the cost of fuel.