The fish is called a snakehead. The burms were released by Hurricane Andrew in 1992. It hit the Miami Metro / Key Biscayne Zoo and a few breeders releasing many different animals into the wild. No white trash knucklehead is going to gas up the car and drive to the Everglades to let go their unwanted pet that is worth several hundred dollars. The Asians however did release the snakeheads. They believe it brings luck to the family as a member passes away. They are good eating though but you can't eat them from South Florida because of all the heavy metals in the water down there. Which is what is really killing the animals in the Everglades. Not the Burms.