12. The Pygmy Marmoset
Found In: The Eastern Amazon Region.
Price: Not specified
Although apes, gorillas, and humans are among the most stunning primates, there are smaller varieties as well. The Amazon region, which includes nations like Brazil, Ecuador, and Peru, is home to pygmy marmosets.
These microscopic creatures have an average growth rate of five inches. You may get an idea of how small these organisms are by comparing them to the average human finger, which measures three inches. Pygmy marmosets are still being studied for their behaviors, although when necessary, they may be rather aggressive.