Mop fly
Also called Mop, Mop nymph
A mop fly is a chenille-bodied nymph tied from microfiber “mop” material, usually with a heavy bead to sink fast.
- Group
- Egg & worm patterns
- Category
- Flies & fly types
- Level
- Intermediate
- Water
- Freshwater
Last updated
What Mop fly means
The body comes from the same microfiber used in mop heads or craft “mop chenille.” It makes a thick, soft profile that looks like a big larva or a wad of food, not a specific insect.
Many versions are tied on a curved nymph hook with a tungsten bead, and they are common in tan, cream, chartreuse, and pink. Some are tied on jig hooks to ride point-up.
Rigging is straightforward. Fish it as the point fly under a strike indicator, or as the heavy fly in a tandem rig with a smaller nymph behind it. A dead drift through seams and softer pockets is the normal presentation.
Why it matters on the water
A mop changes the sink-rate and silhouette of a nymph rig. The bead and the bulky material get down quickly, and the fly stays visible in broken current, off-color flows, or deeper runs.
It is also a good “search” option when there is no clear hatch to match. If fish are eating general larvae, scuds, or drifting debris, the mop’s size and movement can draw strikes that a slim, natural nymph does not.
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Read next
- NymphA nymph is a subsurface fly meant to imitate an aquatic insect in its immature stage, or a small food item drifting in the current. Nymphs are fished with or without weight, an indicator, or tight-line methods.
- Strike indicatorA strike indicator is a small float or marker on the leader that shows takes and depth while nymphing. It moves, stalls, dips, or shoots sideways when the flies get bumped or eaten.
- Tandem rigTwo flies tied on the same leader, one behind the other. The point fly is on the end, and a second fly rides above it, either on a short tag or with the point fly tied off its hook bend.
- Tungsten beadA tungsten bead is a small, heavy metal bead tied on a hook to add weight and help a fly sink faster.