A man who sold live Asian carp in a state where the fish are threatening a $7 billion industry is facing a jail sentence. Proving once again that stupidity knows no boundaries, David Shane Costner of Harrisburg, Arkansas, has pleaded guilty to a dozen felony charges. Each carries a maximum sentence of two years in prison and a fine of $2,000-$20,000.  Costner was caught after selling two grass carp  to undercover officers from the Department of Natural Resources. Investigators say he had been driving around Michigan selling the carp from parking lots. He admitted possessing and selling over 100 live Asian carp. There are serious fears that grass carp, along with other Asian species like silver and bighead carp, are set to invade the Great Lakes where their rapid reproduction, and ability to hoover up huge quantitites of fish on which other species depend, could wreck the $7 billion salmon industry.  Silver carp are notorious for jumping when frightened. Read story here.