The Pygmy Marmoset's scientific name is Cebuella Pygmaea. It is listed as a least concerned mammal, which means it is no longer endangered, but not quiet out of the clear. It has a broad variety of looks. Their colors range from gray, black, brownish gold, or even a greenish fur. The average Marmoset weighs around 4.20 ounces, that's one fourth of a pound! The average height is approximately 5.35 inches. This makes it the world’s smallest monkey!