The Asian clam is very common in Florida, you many not know it’s an exotic.  We are not sure how it got but it first was discovered in the Pacific Northwest in the 1920s and is spreading throughout the country. It was originally thought that it would not survive the warm southern temperatures based on the temperatures of its native waters, but it’s doing quite well everywhere.  If there’s one thing that helps a species to survive in a new environment is its ability to adapt -- genetic plasticity.  The African clawed frog is a common pet store item and it is established in south Florida along with the Cuban tree frog that came in accidentally in shipping crates.