Largespot River Stingray

About

The largespot river stingray (Potamotrygon falkneri) is one of the more sought-after members of the Potamotrygonidae family, a group with the distinction of being the only cartilaginous fishes to have fully adapted to freshwater life. Native to the Paraná-Paraguay River basin in South America, ranging from the upper tributaries down to the La Plata, this species sports the large, boldly patterned spots that give it its common name and set it apart from many of its relatives. It does not appear in the trade with great regularity and tends to command a premium price when it does show up. In the aquarium, this ray occupies the bottom of the tank almost exclusively, so a wide footprint matters far more than raw volume. It is a top-level predator and will consume anything small enough to fit in its mouth, so tankmate selection demands real thought. Large, peaceful mid-to-upper water species tend to work best. Like all Potamotrygonids, it carries a venomous tail spine that should be taken seriously. Careless handling causes most injuries in the hobby, not unprovoked aggression. Given the right setup and diet, these rays can grow remarkably personable over time, often recognizing their keeper and actively approaching at feeding. This is a long-term commitment best suited to a keeper who has done their homework.