Mop Caddis Pupa

We all know mop flies. Just like Squirmy Worm nymphs, they created a real wave in the fly-fishing world: “Those aren’t flies,” “What even are these things?”, “They’re weird,” and so on. In the end, what matters is that they catch fish—no matter what some people say.

Personally, I’ve never fished mop flies. But I had an idea: to tie a caddis pupa using the same chenille that’s typically used for mop nymphs. What I liked most was the material’s movement in the water and the fact that it imitates the abdomen of a caddis pupa extremely well.

So here’s a version I’m genuinely curious to see in action underwater. Yes—this is not a fly I’ve fished yet, and I think this is the first time I’m showing you a pattern I haven’t tested and haven’t caught fish with. Still, I’m confident it will work, because it has all the right elements to trigger curiosity and interest from fish.

Materials:

Hook: size 10/12/14 Caddis shape – here is used the Demmon C400BL
Thread: any you like, I used Sumo because I like to put lot of pressure on materials to stay well fixed
Body: Ultra Wormy Chenille – tan color ( 4mm chenille)
https://www.troutline.ro/troutline-ultra-wormy-chenille-4-mm
Thorax: Mad Rabbit Dubbing – natural and Pure Squirrel Dubbing Plus – salt pepper and mixed with rusty brown – all fixed in dubbing loop
Legs: Partridge grey neck feathers in dubbing loop
https://www.troutline.ro/troutline-english-partridge-natural-grey-1gr
Thorax behind bead : Atomic dubbing A1 color
https://www.troutline.ro/troutline-atomic-synthetic-dubbing