Dead fish, birds, manatees, even a whale shark. Toll from worst red tide in decade grows.

Florida’s southwest coast, a ribbon of inlets and barrier islands normally brimming with wildlife, has become a red tide slaughterhouse this summer. Dead fish by the thousands have clogged inlets and canals. Since Sunday, 10 dead Goliath grouper, the massive reef fish that can live four decades or more, have floated to the surface. At least 90 sea turtles have been found stranded as the tide stretches well into nesting season. And Tuesday, as hundreds of residents packed a standing-room-only Cape Coral yacht club to hear about the federal government’s efforts to deal with water conditions, a dead manatee washed up at a nearby boat ramp. The list goes on: earlier this month the carcass of a whale shark was found on a Sanibel beach with red tide in its muscles, liver, intestines and stomach. Hundreds of double-breasted cormorants, brown pelicans and other seabirds have been sickened or died.