Pomacea diffusa

Pomacea diffusa is a freshwater apple snail in the family Ampullariidae, widely known in the aquarium hobby as the mystery snail or spike-topped apple snail. Pomacea diffusa is valued for its rounded shell, calm behavior, and many ornamental color forms, including yellow, white, blue, purple, and brown varieties, making it a familiar scavenger in planted and community aquariums. Understanding Pomacea diffusa is important because this species has often been confused with Pomacea bridgesii and other larger apple snails, while it is generally regarded as a comparatively plant-safe species when properly fed. In aquarium care, stable water quality, sufficient calcium for shell growth, avoidance of copper-based medications, and a secure lid to prevent escape are essential points for keeping this species healthy and enjoying it responsibly without releasing it into the wild.