I was halibut fishing about 25 miles SW of Homer one summer afternoon many years ago when suddenly the surface of the Inlet came alive with what looked like a writhing ball of snakes about six feet in diameter.  I didn't know if I was having an acid flashback or what the heck I was looking at.  I later described this encounter to an AKDF&G fisheries biologist and he educated me on the presence of lampreys in all of the bodies of water in Alaska.  Boy, the things you see when you don't have a camera...