Was fishing an undisclosed location and saw trout with a white fuzz on its face and have no idea what it was. The fish was hanging out in very shallow water and didnt move when I walked toward it. I tried to catch him but he then swam off. This fuzz stuff was covering his face. My buddies reported seeing the same thing in different parts of the river over a couple of days time. I thought it was a big piece of cotton he swam into but I saw no cotton in this particular place. Any ideas what this is?