Isonychia, Mercer's
A key mayfly nymph that can be one of the best producers when the Isonychia hatch is on. We use this fly a lot in the west-truly a great mayfly pattern.

Our Price: $2.95
Color: Black/Maroon Fish: Trout
Fishing Type: Nymphing Imitation: Mayfly Nymph
Manufacturer: Umpqua Size: 10
Water Type: Freshwater

Isonychia, Mercer's
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