A fly fisherman, also known as an ANGLER, is someone who uses a rod and line to catch fish in freshwater or saltwater. They typically use artificial flies as bait, which are designed to imitate the natural food sources of the fish they are trying to catch. Fly fishermen often use specialized techniques such as casting and mending to present their bait in the most effective way possible. Fly fishing is a popular sport that requires patience, skill, and knowledge of the environment.