Larger fish such as shark, king mackerel, swordfish, and tilefish tend to be highest in mercury because they eat smaller fish and consume the mercury in them as well.

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Tilefish and king mackerel are two such fish, and both were sold to consumers who believed they were procuring red snapper and halibut respectively.

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It will be located in the King's Cross Central development, which sits on a former fish, coal and grain goods yard and spans 67 acres.

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Although nearly 50 percent of the grocery stores visited in Boston sold mislabeled fish, the cod-loving city was tied with Seattle where salmon is king, as having the lowest deception rates.

FORBES: Think You Ate Tuna Sushi For Lunch? Study Finds Mislabeled Fish Nationwide Problem