California authorities have filed lawsuits against 20 national restaurant chains for allegedly failing to warn customers about high levels of mercury in certain types of fish.

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California Attorney General Bill Lockyer filed the lawsuits on Thursday against restaurant chains including Landry’s Restaurants, Red Lobster Seafood Restaurants, Olive Garden Italian Restaurant and Outback Steakhouse, accusing them of knowingly selling swordfish, tuna and shark without posting the mandatory warnings, reported Reuters.


Fish such as swordfish and shark can contain high levels of mercury, which is thought to be harmful to health.


The lawsuits also accuse the restaurants of unfair competition and calls for fines of $2,500 per day for each infraction and a permanent ban on selling the fish without the appropriate warning signs.


 The other defendants in the lawsuit are: Brinker International, the parent company of Chili’s and Romano’s Macaroni Grill, Benihana, Claim Jumper Restaurants, Hof Brea’s, TS Restaurants, the Cheesecake Factory Restaurants, Bennigans and its parent company Metromedia Restaurant Group, McCormick & Schmick Management Group, Morton’s Restaurant Group, Ruth’s Chris Steakhouse, Porterhouse of Los Angeles and Yard House Restaurants.

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