They are defintely at a disadvantage being white and sticking out like a sore thumb. What is fun is watching them with their young. They will open their mouth and all the little ones will swim into it. Then when they think the danger is gone, they come swimming back out. I know other fish do that, but with white fish it really makes it easy to watch.
I never noticed much in my pond the first time I stocked them, but I do not think I stocked enough. I am going with 50 pounds this year for my 1 acre pond. I want results and hopefully that will get it.