Most fly rods are not designed to target specific species. They're built to a length and line weight spec. These are considered "generalist rods" and it's up to the fishermen to determine what fish species a rod is best suited for. For instance, just about any freshwater trout guide will agree a 9-foot 5-weight is the most versatile trout rod in the world. However, understand the rod was not built as a "trout rod."