I didn't watch the video, (no streaming at work)... but will add my 2cents

when I think of parasitic infections, I think warm water. I think of warmer temperatures raised due to water sitting behind a dam or God forbid, climate change... I also think about all the millions of gallons of warm microbe infested waste water dumped daily into rivers, lakes, aquifers, and ultimately, puget sound. Some treated, some just diluted, but most is mixed with trace amounts of chemicals (think of all the treatment plants just to name a few: Lott, Chambers creek, commencement bay, south plant, West point, Brightwater)

We are harvesting crab, geoducks, oysters clams and other filter feeders at an alarming rate... those same critters that scrub the nasties out of the water... has anyone ever considered the amount of water that one geoduck filters in a year, how about multiplying that by the number that are harvested over the course of a year...

our rivers are barren wastelands with no surplus biomass because we harvest every last fish out and then some... baby fish need bugs (dead fish), fish eggs (lots of spawners) and other baby fish (the weak ones) in order to thrive in the rivers. not to mention shrimp, crab, larvae, bait fish, and all sorts of other biological matter in the water that is not human poop, piss and chemically contaminated storm water runoff...

working for an engineering firm that deals in everything wastewater and storm water, I can tell you that it is getting better. but in the last hundred years we fu(ked it up pretty good, and we continue to fu(k it up daily by dumping fertilizers on our lawns and flushing chemicals down our sinks and toilets... Honestly, I don't know that the fish will last as long as it takes to fix it our fu(k ups... not at the current harvest rates and exploding population growth.

we have met the enemy and the enemy is us... we are so worried about that one issue that is affecting the fish that we are forgetting about the thousand other factors...