Animal pouches are specialized structures found in some animals that are used to carry and store food, water, and other items. The term 'animal pouch' is often used to refer to marsupials, which are mammals that have a pouch on their abdomen for carrying their young. Marsupials are found mainly in Australia and South America, and the most well-known example is the kangaroo. Other animals with pouches include some species of rodents, such as the hamster, and some species of fish, such as the seahorse. The term 'SACS' is a four-letter word that refers to these specialized structures.