I know what you're thinking. What actually is a cartoon creature? Well, Tv Tropes defines them as "Nohuman drawn or animated characters of ambiguous species." Cartoon creatures are commonly found in cartoons (hence the name) and sometime japanese anime (tv tropes has some examples). They can also be found in science fiction and fantasy settings as well.
Some of the best known cartoon creatures in the book world can be seen in the works of Dr.Seuss and other children books (from my knowledge MANY literary of examples are in children's literature more than any other genre).
Do you have any favorite cartoon creatures? I would love to heard about them. :)