In the Pagbilao mangal 13 species of gastropods occurred in six microhabitats. Littorina scabra was the most agile and tolerated a wide range of salinities and temperatures. Nerita planospira was the least tolerant to high temperatures. The response of Ellobium aurisjiidae was the slowest and it preferred a low salinity range. Terebralia sulcata could withstand high temperatures and moderately high salinities. The conditions of their microhabitats are comparable to their responses to temperature and salinities.