Avocados are a large family made up of two groups. Some varieties native to the wet climate around the Caribbean Sea and southern Florida are known for their large size, sweeter flesh and lower fat content. Many of these varieties are more rounded in shape and have a somewhat smoother skin than their cousins found in the drier climates of Mexico and southern California. Those varieties are more pear-shaped, have much higher oil content and a pebbly skin. Avocados are used in many vegetarian dishes, making an excellent substitute for meats because of their high fat content. Its creamy texture is perfect for guacamole and as a filling for many types of sushi or sandwiches. Avocado oil has been shown to reduce blood cholesterol.