FORT MYERS, Fla. (AP) — Hurricane Ian not only ravaged southwest Florida on land but was destructive underwater as well. Researchers say it destroyed reefs and brought along red tide, the harmful algae blooms that kill fish and birds. Marine researchers who returned last week from a six-day cruise organized by the Florida Institute of Oceanography to study marine life in the Gulf of Mexico say the hurricane left in its wake red tide and destroyed artificial reefs from afar as 30 miles off the coast of southwest Florida. Officials say red tide is threatening manatees off Sarasota and Charlotte counties that rely on seagrass for food.