A natural fly presentation of a caddis and crane larvae. Mop flies are a fantastic prospecting nymph and attractor fly for nymphing rigs. Once they get saturated with water they drop like an anvil.
A thick larvae imitation that makes for a great attractor fly.
A couple weeks ago I watched a seasoned fly master crush nice browns using mop jig in the same hole I've been fishing with multi nymph rigs. I learned a lot from him about fishing with indicators. He said he's only been using them a year, but" they are the best thing since sliced bread". He said smallies hammer the chartreuse.