Cave physa

The cave physa (Physella spelunca) is a species of small, air-breathing, freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae. It lives only in caves. This species is endemic to the United States.

Cave physa

The cave physa (Physella spelunca) is a species of small, air-breathing, freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae. It lives only in caves. This species is endemic to the United States.