I found some of the browns trouts in weber river were covered with white spots, like in this video:
http://www.youtube.com/watch?v=r10R6qaUFnE
One of my friends told me is because the trout is stocked so not as healthy as the wild trouts.
I suspect the high temperature is the reason behind this. the trout is in the period of post-spawning.
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That is specifically caused by the mucous layer being removed, either naturally, or artificially like with the poor handling of a fish.
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The lower Provo's browns get that fungus too. They'll survive. Wet your hands when handling fish (if you have to) and return them to the water as soon as you can, crimp down your barbs. If you have to take a picture, do it quickly.
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Did you ask the fish? Just kidding!
I have heard all of the above. One thing the video mentioned was that the fish rub the slime coat off when spawning to make their beds. You said it was a post spawner. So would that possibly be a result of something after the spawn? I would think it would take a bit of time for a fungus to get started. I guess we will never know.
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I see it every year also, more in popular spots. I too attribute it to miss handling.
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I got agree with what others have posted you see this thing allot on the middle Provo big old sores and white spots on other wise healthy fish. One guy told me its partially due to over crowding, another its due to the spawn, But in my option its cheap nets ruff handling of fish. [crazy][pirate]
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I have seen something that looks like this in trout at Otter Creek and other places where water temps. are up in the summer.
The dwr. claims it to be a fungus that will go away as water temps. cool.
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