Fish that eat snails, such as chocolate dolls, snails, such as killer snails, lobsters and loaches, eat the eggs of apple snails. Snails may also be eaten by shrimp such as crystal shrimp.
The hermaphroditic animals of apple snail family can reproduce independently as long as one reaches the age and suitable environment, mainly distributed in Africa and America. Their lungs and gills enable them to tolerate anoxic water. In dry seasons, they bury themselves in the subsoil and sleep tightly with their shells closed. In addition to drought resistance, gill cover is also a self-defense device. Pomacea in South America has breathing tubes and lungs. When breathing, snails breathe air underwater to avoid bird attacks.