The Amazing flats flies of Hiromi Kuboki, Saltwater Flyfishing Magazine Feb/March 1997
I believe the crab was created from clipped deer hair with an epoxy finish.
If I still have the mag I'll post the recipe. ........
There is a post here in the archives about his shrimp pattern - type "Hiromi" in the search feature and you should find it.
When sight fishing, look over your shoulder from time to time, you never know who's behind you