One of the invasive species that is causing trouble in the United States is the lionfish. The fish is native to the south pacific and the Red Sea. The species was introduced to American waters after an aquarium broke during Hurricane Andrew and some of the fish were released off the coast of Florida. The fish is raising havoc with the natural order of the reefs.
Lionfish are very aggressive and have caused problems by eating most of the natural reef dwellers. This has led to concerns that the reefs will suffer as the lionfish takes over. Some are calling for government intervention and are hoping the fish can be contained before they spread even farther.