Pygmy marmoset, also known as the pocket monkey, is a tiny primate that can fit in the palm of your hand. Some synonyms for this creature include the dwarf monkey, finger monkey, and the teacup monkey. Despite its small size, it is an incredibly intelligent and agile animal with a unique behavior pattern. They are native to the rainforests of South America and have become popular as exotic pets due to their cute appearance and friendly nature. However, owning a pygmy marmoset as a pet requires a lot of responsibility and special attention, as they have specific dietary and environmental needs to thrive in captivity.