
If you meant “fly” in the fly-fishing sense, these cover the main practical presentations: a shallow-water saltwater shrimp imitation like Bonefish Bitters, a subsurface baitfish pattern like Deep Minnow Stinger, and three strong trout surface options for mayflies and stoneflies: Harrop's CDC Biot Dun PMD, Harrop's CDC Biot Emerger BWO, and Snow Shoe Yellow Sallie. They’re all practical, proven patterns rather than specialty oddballs.
Switch to a streamer or sinking line when trout won’t rise and are feeding deeper or on baitfish. Switch from a dry to an emerger when fish are refusing fully surfaced insects. For saltwater, move from a shrimp pattern to a baitfish fly if fish are chasing instead of tailing.