"(Hey, what else CAN you eat when you're on an island?)"
They can eat just about anything just as easily as they do fish. Their seas are fished out, so the fish they eat is imported, millions of pounds a day form the California coast alone.
My dad used to go over there on business trips. He said alomst everything tasted like fish, and a lot of places smelled like fish.
I understand that they can import foods and eat other meats, but still...