Tribal fisherman from Pendleton motor to the Willamette Falls to harvest lamprey, Sat., Jun. 29, 2013, in Oregon City. The fish hang out in pools below the falls and also climb the rock walls to move up stream. The take was trucked on ice for distribution to tribal members. Lampreys are round like snakes but with smooth skin and fins. Their mouth is a parasitic suction cup with concentric rings of teeth. The tribes have treaty rights that allow them to harvest Pacific lamprey. For generations, it's been an annual tradition.