Federal officials have declared an unusual mortality event for the state's manatees. An investigation is underway as to why they're dying off so quickly. More than 700 manatees have died in Florida so far this year. That's more than double the average.
"The manatees that they are seeing on the east coast are all coming in with the same situation. Extremely underweight, extremely thin, some to the point that it can't be reversed," Clearwater Marine Aquarium Research Institute's Jenn Galbraith says.