Raspy river stingray

Potamotrygon scobina

Fine pale markings on brown, with a tapering tail.

A subcircular brown disc carries tiny pale marks or small ocelli, with a tail thinning after the sting. Adult patterns also vary.

Natural habitat: Native to the middle and lower Amazon, lower Tocantins, Pará and Trombetas rivers in Brazil.

Small-ray advertising does not make it suitable for a small tank.

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Appearance and identification

The 2017 revision redefined the old scobina complex. Adamastor, amazona, garmani and limai are not aliases of scobina. Belem or dwarf-ray trade labels alone cannot identify the fish.

Floor and movement space

Allow open turning space for actual adult disc and tail dimensions. Avoid contact with the sting.

Aquarium environment

Fine markings do not make a dense small planted tank suitable. Leave smooth routes around disc and tail.

Diet and feeding

Takes insect larvae, molluscs and crustacean foods, though wild-caught individuals may not accept every food.

Compatibility limits

Small aquatic animals can be prey; a relatively small ray is not automatically shrimp-safe.

Same-species behaviour

Assess individuals and separation needs.

Sources

shark-references.com ↗ 2026-10-22

www.fishbase.se ↗ 2026-10-25

www.mapress.com ↗ 2026-10-22

doi.org ↗ 2026-10-22