This is a simple version of the Deceiver fly. It's a great baitfish imitator, great for all species of saltwater fish. I've also caught bass and crappie on it.
#2 - 2/0 stainless hook such as a Mustaad 34007
4-10 hackle feathers
Gold or silver flash
Gold or silver mylar for body
Red bucktail collar
Peacock hurl topping
Tie in the hackle, then the flash. Tie in the mylar at the back, extend thread to front of hook, then wrap the mylar body. Tie in the collar, then the topping. Tie cone head, then coat with a couple of layers of Hard As Nails or epoxy.