Fish trap

It is easy for fish from the Atlantic Ocean to swim into the Mediterranean through the narrow neck at Gibraltar, and difficult for them to find their way out.

[2] The prehistoric Yaghan people who inhabited the Tierra Del Fuego area constructed stonework in shallow inlets that would effectively confine fish at low tide levels.

The trabucco is an old fishing machine typical of the coast of Gargano protected as historical monuments by the homonym National Park.

[4][5] Indigenous Australians were, prior to European colonization, most populous in Australia's better-watered areas such as the Murray-Darling river system of the south-east.

In southern Victoria, such as at Budj Bim (now a UNESCO world heritage site[8]) indigenous people created an elaborate system of canals, some more than 2 km long.

[10] Somewhat similar stone-wall traps were constructed by Native American Pit River people in north-eastern California.

This involves the construction of a temporary dam resulting in a drop in the water levels downstream— allowing fish to be easily collected.

Fish traps contribute to the problem of marine debris, unless they are made of biodegradable material, says a United Nations report.

[14] Each year, fisheries in Chesapeake Bay (Northeastern United States) lose or abandon 12 to 20 percent of their crab traps, according to a government report.