Wooly buggers are a classic freshwater fly. They work well in saltwater estuaries as well. This version uses saltwater capable hooks. Marabou and hens hackle gives the fly lots of mobility in the water, even at rest.
Hook - Gamakatsu SL45 #4
Eyes - Beadchain medium
Tail - Grizzly Marabou
Flash - Krystal Flash Herring Back
Underbody - Fly Fish Food Small Stonefly Chenille/Variegated Chenille
Collar - Hens Grizzly Saddle or Neck Feathers.