Fuzzles are natural creatures that the Vykkers capture to run tests on. Khan noticed that early Fleech designs resembled Fuzzles, so it's a kind of Forum belief that that's where their design comes from.
And if you're going to ask single Oddworld questions that don't require much of an answer, I recommend putting them in TheKhanzumer's Oddworld Questions and Answers topic, although kudos on not starting a new topic for your questions.
