The clear freshwater pools on the summit form by rainwater gathering in eroded depressions, and are home to unusual clam shrimp and fairy shrimp. The tiny shrimp appear only during the rainy season. Through the process of cryptobiosis, the tiny shrimp eggs (or cysts) can remain dormant for years in the dried out depressions, awaiting favorable conditions. These vernal pools are also home to several federally listed rare and endangered plant species, such as black-spored quillwort ("Isoetes melanospora") and pool sprite (also called snorkelwort, "Gratiola amphiantha").