In greek, marinated octopus in oil and vinegar, known as, is pronounced khtah-po-thee ksee-thah-toh. Octopus is a great favorite in greek cuisine as an appetizer or meze, side dish, or main course and this marinated version is particularly tender. It can be made ahead of time and stored in the refrigerator for several days. Octopus loses a lot of its volume during cooking, so expect the 4 1/2 pounds called for in this recipe to cook down and be enough for 6 servings.