Don't under estimate the size of these fish when adult. This specimen was in a 500gall (2250 litres) tank measuring L, W, H - 240cm x 120cm x 75cm (8ft x 4ft x 2.5ft) and the tank is barely big enough.
Excellent filtration and maintenance regime is mandatory when keeping stingrays. Stingrays are Elasmobranchs and they have a skeleton of cartlidge rather than bone, they lack swim bladders. Some Elasmobranchs appear very similar to bony fish but they have very different physiologies. One difference which is very important to fish keepers is that they don't tolerate medication at all well.
Potamotrygon motoro is a carnivore, their natural diet includes - insects, molluscs, crustaceans, annelids (worms) and fish. In captivity they require pretty much the same. Live prey is not necessary as the frozen alternatives are all readily accepted with the advantage of being less risky from a health point of view.
Peaceful with fish which are to large to eat. Stingrays are easily bullied and damaged. If their disc is damaged there is a possibility of infection and this may prove difficult to treat and may even prove to be fatal. It is essential that stingrays are kept either in a species tank or with other largish but peaceful species.
Male stingrays have "claspers" which are used for internal fertilisation. They are paired and are located on each side of the pelvic fins. The claspers are clearly visible even in very young fish.
Potamotrygon motoro is a live bearing fish which gives birth to 3 - 20+ live babies which measure around 30cm in diameter at birth, after a gestation period of around three months.
IUCN Redlist - Data deficient. Possible threats include, over collection for the aquatic trade, over fishing (Stingrays are apparently very good to eat), hydro-electric plants, habitat loss.
pH: 5 - 6
dGH: 2 - 8
Temperature: 22 - 26°C (72 - 78°F)
Size: 90cm (36in), usually less.
Min tank size: 2,000 litres
Difficulty level: Very difficult.
Aquarium type: Species/Community
Swimming level: Bottom
Origin: S America, Amazon and Orinoco river basins.
Habitat: Lakes, rivers and streams where there is a sandy or muddy substrate.
Species: P. motoro, (Müller & Henle, 1841)
Other common names: