Pomacea is a genus of freshwater snails commonly known as apple snails. They are characterized by their large, rounded shells, which can vary in color from yellow to brown. These snails are found in various aquatic habitats, including ponds, lakes, and rivers, primarily in tropical and subtropical regions. Apple snails are herbivorous and play a role in the ecosystem by consuming algae and decaying plant matter. Some species, like the Pomacea canaliculata, are known for their rapid reproduction and can become invasive in certain areas, impacting local flora and fauna.