Nobu is now telling its patrons not to eat the bluefin tuna on the menu because it is endangered. The menus in the London restaurants now offer some “advice” to diners, stating that the pricey fish is “environmentally challenged” and that they should ask their server to suggest an alternative. 

This move comes after a five-year campaign against the chain’s refusal to stop stocking bluefin. 
Personally, I don’t see why they don’t just take it off the menu, but you know how these “celebrity restaurants” can be. Or something. Very, very strange. It’s weird enough to me that a restaurant would knowingly stock an endangered species, but what of the forewarned consumer who orders it? 
You can read more about it here