Strike IndicatorsStrike Indicators Fly Fishing strike indicators for every situation. Strike indicators for nymph fishing rivers small and large. Includes Air Lock, Thingamabobbers, quick release chironomid indicators, Palsa, foam, yarn, and stick-on indicators. Read more Fly fishing strike indicators are an important accessory for fly fishing in both rivers and lakes. Strike indicators are placed on the leader above the fly and float on the surface to help anglers detect when a fish grabs the fly. There ar...