Lithasia armigera (Armored Rocksnail) is an imperiled pleurocerid (Gastropoda: Cerithioidea: Pleuroceridae) historically found throughout the Ohio River drainage. Its reproductive behaviors, like most aquatic gastropods, are poorly understood. We began propagating Armored Rocksnail in captivity, and herein report on the egg-laying behaviors of the species. These data can help natural resource and conservation managers prepare propagation and recovery plans to help conserve at-risk species.