Fuzzles are small wildlife first seen in Oddworld: Munch's Oddysee and later in Oddworld: Stranger's Wrath.

Fuzzles consist of nothing more than a round blob covered with thick brown fur with two bulging eyes and a large mouth full of razor sharp teeth. They have no limbs, and instead move around via bouncing. They speak in high-pitched squeaks and mumbles, though they can apparently be understood by other creatures. Despite being small and easily killed as a singularity, they are extremely vicious in large numbers and can take down creatures several times larger than they are by jumping and swarming. Fuzzles are quick to anger and are suspicious of all non-fuzzles, but will aid others if they prove themselves trustworthy. Munch is an example of this type of trust.

Source: http://oddworld.wikia.com/wiki/Fuzzle