Fly fishing involves using a longer, floating line and casting a very small fly lure instead of traditional bait or lures. There is an art to the delicate cast that places the tiny fly on the water surface naturally to mimic an insect and attract fish. While fly fishing is commonly used for trout, it can catch various fish species. The document's author has been fly fishing for many years, teaches it as an instructor in Alaska, and enjoys answering questions about the hobby, though it is an expensive one.