For communities, fisheries provide not only a source of food and work but also a community and cultural identity.
 Semantical impact
The expression "fishing expedition" (usually used to describe a line of questioning), describes a case in which the questioner implies that he knows more than he actually does in order to trick the target into divulging more information than he wishes to reveal. Other examples of fishing terms that carry a negative connotation are: "fishing for compliments", "to be fooled hook, line and sinker" (to be fooled beyond merely "taking the bait"), and the internet scam of Phishing in which a third party will duplicate a website where the user would put sensitive information (such as bank codes).
 Religious Impact
Fishing has had a major impact on the religious institutions, with a distinct effect on all major religions, including Islam, Christianity, Buddhism, Jainism, Zoroastrianism, Wicca, Hinduism, Latter Day Saints and the various new agereligions.
According to the Roman Catholic faith the first Pope was a fisherman, the apostle Peter, and a number of the miracles reported in the Bible involve it. Additionally, the Pope's traditional costume include a fish-shaped hat which some say is a representation of the Philistine god Dagon.
 Mercury content
California sign warning about the risks from mercury-containing fish.
Fish and shellfish have a natural tendency to concentrate mercury in their bodies, often in the form of methylmercury, a highly toxic organic compound of mercury. Species of fish that are high on the food chain, such as shark, swordfish, king mackerel, albacore tuna, and tilefish contain higher concentrations of mercury than others. This is because mercury is stored in the muscle tissues of fish, and when a predatory fish eats another fish, it assumes the entire body burden of mercury in the consumed fish. Since fish are less efficient at...