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In page Sustainable sushi:

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Irresponsible fishing practices if allowed to persist unabated would lead to a seafood species worldwide crash by 2048 (in a worst-case scenario).[2] It is estimated that worldwide, 90% of large predatory fish species are gone. Of the 230 US fisheries assessed, it was determined that 54 stocks are overfished, 45 are currently undergoing overfishing while the status of a bit over half of the US’s stocks are unknown.[citation needed] These problems are largely due to the lack of regulation fishing has had in the past. In the 1960s there was complete access to the fish supply. Marine fisheries were not regulated and largely exploited fishing for economic gain as calls for the expansion of US fishing fleets were met by increased fishing efficiency.[2]