Commercial fishing is the activity of catching and marketing fish and other seafood for profit. Commercial fishers harvest a wide variety of animals, ranging from tuna, cod, and salmon to shrimp, krill, lobster, crab, clams, and squid. A commercial fishing business may vary from one individual with a small boat, to a huge fleet of trawlers processing tons of fish every day. Fishing methods vary in scale and operation according to the region, the species being fished for, and the technology available. Commercial fishing gear may include surrounding nets (e.g. purse seine), trawls (e.g. bottom trawl), dredges, hooks and lines (e.g. long line), gillnets, and traps. Sustainability of fisheries is improved by using additional equipment that eliminates or minimizes catching non-targeted species ( bycatch ).
Commercial fishing is one of the most dangerous occupations. The United States is a global leader in responsibly managed fisheries and the sustainable seafood industry provides over one million jobs. Commercial fishing is often a family tradition where multiple generations learn the trade and pass down their knowledge.