Scientific experiments have been carried out to determine P. heterostropha's resistance to seawater. P. heterostropha has shown an incredible resistance to water with high salinity. The experiment placed P. heterostropha in tanks with varying sea water concentrations and determined that P. heterostropha could actively live in water with a salt concentration as high as 25% sea water. In water with a sea water concentration above 25% the snails would become inactive. The study found that P. heterostropha would eventually die if placed in water that was 50% sea water. One of the control groups was able to withstand a high concentration of sea water but became inactive. When placed back into a more normal salinity they quickly revived (Richards). This goes to prove that animals need to come up with good adaptations in order to thrive in nature.