Overview
The Short-Tailed River Stingray (Potamotrygon brachyura) is a advanced freshwater species known for its brown-olive, mottled coloration. Largest FW stingray. Bottom.
Origin & Appearance
Origin: South America.
Colors: Brown-Olive, Mottled.
Body Shape: Depressiform Wide (flat disc). Typical adult dimensions: 100.0 x 110.0 x 8.0.
Sexual Dimorphism: Moderate; males have claspers on pelvic fins.
Tank & Water Requirements
| Min Tank Size | 1321 gallons |
| Temperature | 75–82°F |
| pH Range | 6–7.5 |
| Water Hardness (GH) | 3-10 |
| Bioload | very-high |
| Oxygen Demand | high |
| Plant Safe | mostly |
| Aquarium Position | Bottom |
Behavior & Activity
Bottom glider; largest freshwater ray; massive disc-edge undulation; needs enormous floor space
Speed: 40/100Aggression: 3/10nocturnal
Breeding
Difficult; live bearer (ovoviviparous)
Common Diseases
💊 Bacterial💊 parasites💊 sensitive to medications
Expert Notes
Largest FW stingray; can exceed 1m disc width