Arroyo Yabebiry is a substantial waterway in Misiones, Argentina, whose name derives from the Guaraní for "river of the rays" (stingrays). It originates in the Sierra de Misiones and flows through the departments of Oberá, San Ignacio, and Candelaria, serving as a natural boundary between them before emptying into the río Paraná. Together with its tributaries, the system totals 130.1 kilometers of waterways and drains a watershed of approximately 1,889 square kilometers.

The lower portion of the arroyo is characterized by well-developed alluvial plains and occasional wetland areas, which receive significant organic input from remnant riparian forest and surrounding vegetation, particularly during flood pulses. This lower section also functions as a nursery habitat for fish populations. The arroyo has been designated both a Reserva Íctica (fish reserve) and an Área Natural Protegida, which may carry specific regulations for activities on the water; paddlers should verify current rules with local authorities before launching.

Several recreational areas exist along the arroyo and near its mouth. The Playita del Sol in Puerto Nuevo and the Club de Río in Paraje Payal are established balnearios (river recreation spots). The Boca del Yabebiry, located within Parque Provincial Teyú Cuaré near San Ignacio, marks the confluence with the río Paraná and provides access to the Isla del Toro. The Ruta Nacional 12 bridge near San Ignacio and Loreto offers a potential reference point for access along the lower reach.

Paddlers should be aware that the lower valley lies within the influence zone of the Yacyretá hydroelectric project, which has the potential to alter water levels and floodplain conditions in that section over time.