I went Trout fishing with my family for many years as a boy. We caught Trout mostly in California but also Utah and Wyoming. (Rainbow and Brown) As regards habitat, we found them in huge lakes, small lakes, wide rapid rivers, and relatively shallow streams. Water temperatures ranged from about 33F (yes, that cold) to about 65F. Plants for an environment where Trout are found range broadly because of their wide distribution. I remember lots of redwood trees, lots of tall grasses at riverbanks. The Green River near Flaming Gorge Dam in Utah comes vividly to mind when I think of Rainbow Trout. It's too bad I didn't enjoy eating fish until after I stopped fishing, because the beautiful Rainbow Trout provided everyone else in my family with a lot of meals. Good luck with your rendering, bikermouse, and please show us what you come up with!