An arctic blast that brought a rare snowfall to northern Florida last week left green sea turtles as far south as St. Augustine suffering from a condition known as cold stunning.

On Florida’s east coast, offshore Nassau and Volusia counties, an ongoing cold-stunning event has harmed about 120 green sea turtles so far. While that’s far fewer than the hundreds rescued off the Panhandle, it’s the most stressed turtles the state has documented in Northeast Florida, according to the wildlife agency.

In Florida's cold weather, 18 cold-stunned turtles were rescued from frigid waters. There are 29 turtles under critical care at The Florida Aquarium.