It's been my experience that brown trout and very aggressive for the first time. Each year I generally stock 30 browns and 70 rainbows. I will almost always catch 3-4 browns for every rainbow caught. They are that aggressive. However, once they have been caught once, they are much more difficult to catch a second time compared to rainbows. I know I have a few brown trout that have survived a couple of years that are now over 6 pounds but are almost impossible to catch...