Sea lampreys in the great lakes were the first recognized blessing from the sea accredited to the improvement devised to connect the  Lakes with salt water shipping - since then over 180 invasive species are recognized, from alewives to zebra mussels to diseases.. Most clinging to ships or hiding in foreign bilge/ballast water.. The Lamprey is the most hideous, repulsive of the lot.. Fish and Wildlife has spent millions over the years in an attempt to control the menace which wipes out tons of mature soft scaled fish with limited success. As for a food source, no thanks, the look and feel of these things induces the gag factor.. Invasives continue to pour into our Lakes due to no control by the Fed, and the failure of O'Bomber to close the entry port at the Chitcago Sewer - which ultimately will bless us with asian carp, which undoubtedly are here already.. ThankYou All High and Mighty - NOT..!