What types of fish can be found in Mammoth Cave?

Flatworms, isopods, amphipods, eyeless cave shrimp, cave crayfish, bristletails, collembola, booklice, eyeless fish, segmented worms, snails, copepods, Spiders, phalangids, mites, pseudoscorpions, millipedes, cave crickets and cave beetles are cave-dwellers and virtually live out their life history inside Mammoth Cave. It's estimated that there are some 200 species of tiny creatures living inside the cave system. Crickets, bats, packrats, flies and gnats are cave guests and do not always remain inside the cave.

Raccoons and frogs enter the cave occasionally, and gray and fox squirrels have been known to frequent the area.

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