Fish hook with some form of corrosion-resistant surface coating. Corrosion resistance is required not only when hooks are used, especially in saltwater, but while they are stored. Additionally, coatings are applied to color and/or provide aesthetic value to the hook. At a minimum, hooks designed for freshwater use are coated with a clear lacquer, but hooks are also coated with gold, nickel, Teflon, tin and different colors. There are a large number of different types of fish hooks. At the macro level, there are bait hooks, fly hooks and lure hooks. Within these broad categories there are wide varieties of hook types
Blue bottle fly pawpaw ("Asimina triloba"), dead horse arum ("Helicodiceros muscivorus"), goldenrod and some species of the carrot family. These insects like to fly in packs in order to detect possible food more efficiently. If one fly detects food, it will disperse a pheromone which will alert the others to the meal. Its larva, used as fishing bait, is called a maggot, while its pupa, also widely used for bait, is called a caster. This bluebottle fly can cause human or animal myiasis. Forensic scientists sometimes identify it in the course of their works, particularly in the case of an autopsy of a