These are several Great Lakes invaders and might do well in Florida if they get here.  Most of us are familiar with which the zebra mussels spread. Cercopagis is a small crustacean also spreading quickly to all the Great Lakes and the Finger Lakes of New York State. It’s native to the Caspian region of Eurasia. The snail, a native of New Zealand, is also in the Snake River system in Idaho and is doing well, hundreds of thousands per square meter. They have spread into Yellowstone Park probably unknowingly by fisherman. The state of Montana has closed small isolated areas to fishing where the snail is found to keep it from spreading.