Unfortunately, the python burrow up in a hole and can wait out a cold snap as long as its not too bad.
The only thing keeping them as far south as they are is winter temps.
I saw a few muttons swimming slow belly up. Didn't any dead snook down here. The day before the cold snap I saw a school of no exaggeration 50-75 snook all of decent size from 45in to 25in. Im outta Biscayne National Park.