Dictionary of Ichthyology  

zone = 2) a fishing zone is a zone of variable width (up to 200-nautical-miles) proclaimed by a coastal State around its coast, within which it controls domestic and foreign access to fish resources.

Fishery zone symbol from Wikimedia Commons: http://commons.wikimedia.org/wiki/File:NChart-Symbol_INT_Fishing_Area.svg

Canadian Museum of Nature
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