The Clouser Minnow was developed as a smallmouth bass pattern by Bob Clouser but has become the most famous of all saltwater flies. The Clouser Minnow – White is used in both fresh and saltwater and is a universal fly for all types of species. Use it for trout, bass, stripers, and certainly bull trout and other char in the freshwater. It is a no-brainer for smaller tuna like bonito, sierras, and a whole host of other smaller species in the saltwater. Size 6.