Here's a little doodle of a common critter in the Moon World: The Fluffs.

The fluffs are little fluffy balls critters who live in many location in the moon world.
They are harmless little creatures and are really shy. This make them difficult to find.

Wilds fluffs are commonly found in plains, forest and any outside places.
They are really hard to see because their fur color change according to the season: Green in spring, yellow in summer, red in autumn and white in winter.
Female Fluffs have a little particularity. They have a flower on their body and this flower produce a fruit on autumn. In Winter, female fluffs looks like male fluff which makes them difficult to differentiate.

The fluffruit accelerates the regrowth of the fur and makes it also softer.

Cave fluffs have bats ear since they live in dark area, they use echolocation. Their antennas produce sound waves for them to find their way.
Male fluffs have their antennas on the side of their eyes since the female ones are on top of them.

Mushrooms fluffs are find in wet areas like swamp or deep forest.
The male have three mushroom on the top of his head while the female fur just take the mushroom colors.

House fluffs are find in inner area like houses, factorys, markets.
They looks like little balls of dust to go unnoticed. The female Fluff have a long curly hair on top of his head.

Since the Moon World is mostly corrupted, some fluffs became corrupted too.
Corrupted fluffs are not harmless like the others fluffs. The don't hesitate to attack other creature and corrupt them too.

Fluffs make their nest in little hole everywhere like tree hole, walls hole or others places.
Their nest is make with string produce by the two fluffs. They put their eggs in these nest until the babys are born.

Baby fluff are always white when born, their appearance and fur color change with the environment they lived.
An Adult Fluff can't change even if he change the place where he lived.