Links and sources
http://www.seagrant.umn.edu/downloads/x106.pdf
http://www.invadingspecies.com/invaders/fish/sea-lamprey/
http://www.arkive.org/sea-lamprey/petromyzon-marinus/
http://www.invadingspecies.com/invaders/fish/sea-lamprey/
http://www.arkive.org/sea-lamprey/petromyzon-marinus/