page_title: Angling
section_title: Spreading disease
hierarchical_section_title: Angling / Baits / Spreading disease
caption_attribution_description: English: Illustration of Pimephales promelas, the fathead minnow
context_page_description: Angling is a method of fishing by means of an "angle". The hook is usually attached to a fishing line and the line is often attached to a fishing rod. Modern fishing rods are usually fitted with a fishing reel that functions as a mechanism for storing, retrieving and paying out the line. Tenkara fishing and cane pole fishing are two techniques that do not use a reel. The hook itself can be dressed with bait, but sometimes a lure, with hooks attached to it, is used in place of a hook and bait. A bite indicator such as a float, and a weight or sinker are sometimes used.
  Angling is the principal method of sport fishing, but commercial fisheries also use angling methods such as longlining or trolling. Catch and release fishing is increasingly practiced by recreational fishermen. In many parts of the world, size limits apply to certain species, meaning fish below and/or above a certain size must, by law, be released.
  The species of fish pursued by anglers vary with geography. Among the many species of salt water fish that are caught for sport are swordfish, marlin, tuna, while in Europe cod and bass are popular targets.
context_section_description: The capture, transportation and culture of bait fish can spread damaging organisms between ecosystems, endangering them. In 2007 several American states enacted regulations designed to slow the spread of fish diseases, including viral hemorrhagic septicemia, by bait fish. Because of the risk of transmitting Myxobolus cerebralis (whirling disease), trout and salmon should not be used as bait.
  Anglers may increase the possibility of contamination by emptying bait buckets into fishing venues and collecting or using bait improperly. The transportation of fish from one location to another can break the law and cause the introduction of fish alien to the ecosystem.
caption: Fathead minnow — a common bait fish
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