The Alaskan S.T.S. Leech, aka the Alaskan Super Tungsten String Leech, aka the Alaskan Salmon, Trout, Steelhead Leech) is equally adept at catching trout, steelhead and silvers. Early in the season, when everyone else is fishing black leeches for rainbows, pull out the Passion Pink STS. Trout love it! Steehead crush it. And come August, silvers pounce on it, too!