Species name: Potamotrygon motoro

Common Names: Ocellate river stingray

Family: Potamotrygonidae (River stingrays)

Class: Elasmobranchii (sharks and rays)

Max. size: 100 cm WD / 39 inches WD 15 Kg

Environment: Freshwater

Origin: South America. Uruguay, Paraná-Paraguay, Orinoco, and Amazon River basins.

Temperament: Timid. Do not keep with territorial fish. Will eat small fish.

Company: .Other rays and non aggressive fishes.

Water parameters: pH 5.0-6.0, dH -10, temperature 24-26°C / 75 - 78° F

Aquarium setup: These rays need an aquarium with alot of open space to swim on as they like all cartilaginous (lack gas bladders) fish need to be in constant movement. A minimum aquarium size for motoro sting rays can be said to be 100G. The water needs to be kept clean and good filtration and regular water changes are a necessity. They are sensetive to  ammonia, nitrite, and nitrates as well as many other chemicals and special care should there for be taken before using chemicals and medicines in aquariums containing Motoro sting rays.

Feeding: They can be feed a long row of different fods such as cut beef heart, fish fillet, earth worms, krill, blood worms, cocktail shrimp,clams and live fish. don't feed to much goldfish feeders as they lack necessary nytrients.

Breeding: Motoro rays are hard but not impossible to breed. They give birth to live young called pupps. Freshwater rays have internal fertilization. They fry can be sensetive and excellent water quality is a necessity. They are easy to sex as the females lack the modified pelvic fins for genetic transference that are found among males. They are mature at about 25 cm / 10".