Le Manoir, which holds the coveted accolade of two Michelin stars, can now show the MSC logo on its menus, which ensures diners that all fish comes from sustainable sources.
Blanc, who is the 2009 Catey Lifetime Achievement winner, called on other restaurateurs to follow his lead in becoming more sustainable.
"By supporting MSC, I am ensuring that, as a chef, I am helping to ensure that fish stocks will be replenished for generations to come," he told the Independent on Sunday.
The MSC this year celebrates its 10th anniversary, which was marked with a reception at Clarence House earlier this month.
At the event Prince Charles warned of the inevitable nightmare the world faces if the issue of overfishing is not addressed.
By Kerstin KÁ¼hn
E-mail your comments to Kerstin KÁ¼hn here.
Looking for a new job? Find your next restaurant job here with Caterersearch.com jobs