One of the disturbing things is that many of the lampreys seen attached to the fish are not the maximum size either and that means that they escaped earlier treatments and have a considerable life span left to do damage as they are past the "vulnerable" stage exploited by treatment. Seneca's problems are complex though and not just a function of ONE factor. The lampreys are additional serious stressors to the lake and its problematic fishery but the invasives, blue algae blooms, disappearance of vital food sources (e.g. zooplankton, and phytoplankton) for the young of various species, covering of the traditional spawning beds by Zebras and Quaggas, various pollutants entering the watersheds, large fluctuations in bait availability, etc.are wreaking havoc on Seneca and also to various degrees on many of the other Finger Lakes. You put all these stressors together and you end up with what we now have going on and I don't believe the DEC or anyone else for that matter has a clue about how to deal with correcting it. This is not a criticism of the DEC either as thisis a highly complex set of problems.