If it looks like a duck, quacks like a duck...is it a duck?

In my brief on-line research it appears that all salmonids, as well as some other cold-water game fish, are susceptible to the whirling disease parasite. Some species and strains are more resistant to it than others, and the web search I did suggested a couple of salmonid species from western waters are more resistant than most. Even if lakers are supposedly resistant, the pic of that laker posted by YoAdrien certainly looks spot on for whirling disease. If anyone catches fish like this in the future make sure to remove / kill the fish and properly dispose of the killed fish. Otherwise, the parasites will ultimately kill the fish anyway and then tons more parasites will be released into the lake...

The web link I provided a couple posts ago has a lot of information including a chart of the life cycle of the parasite. Its probably a good idea for us to start tracking / reporting observations of potenital whirling-disease infected fish on the board.