Cabomba's a waterplant genus, one of two belonging to the family Cabombaceae. It's divided submerged leaves in the shape of a fan (hence the vernacular name fanwort) and's much favoured by aquarists as an ornamental and oxygenating plant for fishtanks. Its use in the aquarium trade has led to some species being introduced to parts of the world, such as Australia, where they've become pestilential weeds. Species Cabomba aquatica Aubl. (fanwort) Cabomba caroliniana A. Gray ("Green Cabomba") Cab… (More on Cabomba)