Whirling disease has been destroying trout throughout the world for the past few years. The trout get it and lose their equilibrium and sense of propioception. It is major problem affecting all hatchery raised trout. That was the reason LNL stopped importing the Utah trout. You can kind of see this as the negative affects of farm raising fish. This same kind of problem has been showing up in farm raised sardines that are used to feed the tunas in the pens. Millions of sardines have now been infected with various bacteria and viruses that are destroying the wild sardines all over the world. Most of the studies thus far have been on the decimation in Mexican waters. So when you drive across the border and see those tuna pens. You should realize that they are contributing to the extinction of the ocean's creatures.