Perfect Rhyme:
* (None) There are no common animal names that rhyme perfectly with "cool."
Near Rhyme (Similar Sound):
* Pool (as in a pool of water) - While not an animal name itself, it could be used to describe a group of animals, like a "pool of fish."
* Shoal (a group of fish) - This word has a similar vowel sound to "cool."
* Spool (a reel of thread) - While not an animal, it's close enough to "cool" to work in some contexts.
Creative Solutions:
* You could create a name: Perhaps a creature called "The Cooly" or "The Kool-Aid" could work!
Ultimately, the "best" rhyming animal name depends on the specific context and your creative intent.