11. Sea lampreys ( " Petromyzon marinus " ) have been seen attached near the cloaca of this shark.12. The program may be used as a model for control of the sea lamprey infestation of the Great Lakes. 13. The main reasons for its extinction were competition from the invasive alewife and predation by the introduced sea lamprey . 14. Mature sea lampreys attach themselves to game fish, feeding on the blood of lake trout, salmon and other species. 15. Invaders such as the sea lamprey , ruffe and round goby threaten the $ 4.5 billion Great Lakes fishing industry. 16. Poor river conditions, pollution, and the impacts of parasitic sea lampreys contributed to the failure of these stocking programs. 17. Both eels, anadromous salmoniform fish and the sea lamprey have different tolerances in salinity in different stages of their lives. 18. New York's Finger Lakes sea lamprey control program is managed solely by the New York State Department of Environmental Conservation. 19. There is a low-head dam by Gladstone Golf Course installed in 1978 to prevent upstream migration of invasive sea lamprey . 20. Invaders such as the sea lamprey , ruffe and round goby threaten the $ 4 . 5 billion Great Lakes fishing industry.
