Opuntia Megapotamica (Opuntia Megapotamica) is a perennial cactus in the Cactaceae family with moderate care difficulty. It requires low watering and full sun or partial shade light in USDA hardiness zones 9-11. This plant is safe for cats and dogs. It can be grown indoors.

Opuntia megapotamica is a rare species of cactus native to South America, particularly found in Uruguay, southern Brazil, northeastern and north-central Argentina. It is characterized by flattened pads and orange flowers.