A: Absolutely. Larger brown trout are perhaps the most vicious and intelligent predators in freshwater, a kind of aquatic Hannibal Lecter. To give just one example, monster browns of 10 to 20 and more pounds often hang out below a certain riffle in a Southern tailwater that's popular with flyfishermen. The numerous smaller trout put back in the water there by the fly guys are sometimes wounded or disoriented. When the released trout drift downstream, they meet a huge pair of waiting jaws.