Pilaa

Pilaa is a genus of freshwater snails belonging to the family Ampullariidae, commonly known as apple snails. These snails are native to tropical and subtropical regions of the world, with a significant presence in Southeast Asia, Africa, and South America. They are characterized by their large, rounded, and often colorful shells, which can range in size from a few centimeters to over 15 centimeters in diameter depending on the species. The operculum, a hard, lid-like structure, protects the snail's aperture when it retracts into its shell.

Members of the Pilaa genus are predominantly herbivores, feeding on aquatic plants and algae. Some species may also scavenge on decaying organic matter. They are known for their ability to breathe both air and water, possessing both gills and a lung. This adaptation allows them to survive in environments with fluctuating water levels and low oxygen content. Pilaa snails reproduce by laying clutches of eggs, typically on vegetation above the waterline. The eggs are often pink or red and encased in a gelatinous mass.

Some Pilaa species are cultivated for human consumption, particularly in Asian countries where they are considered a delicacy. However, certain Pilaa species are also considered invasive pests in some parts of the world, especially when introduced outside their native range. Their rapid reproduction and consumption of aquatic vegetation can disrupt local ecosystems and interfere with agricultural practices.