Fish hook designs, shapes, and materials are all variable depending on the intended purpose of the fish hook. Fish hooks are manufactured for a range of purposes from general fishing to extremely limited and specialized applications. Fish hooks are designed to hold various types of artificial, processed, dead or live baits (bait fishing); to act as the foundation for artificial representations of fish prey (fly fishing); or to be attached to or integrated into other devices that represent fish prey (lure fishing). The fish hook or similar device has been made by man for many thousands of years. The world's oldest fish
Fly fishing rather than lure. Non-flyfishing methods rely on a lure's weight to pull line from the reel during the forward motion of a cast. By design, a fly is too light to be cast, and thus simply follows the unfurling of a properly cast fly line, which is heavier and tapered and therefore more castable than lines used in other types of fishing. The physics of flycasting can be described by the transfer of impulse, the product of mass and speed through the rod from base to top and from the transfer of impulse through the fly line all the way