Potamotrygon castexi (Otorongo Ray, P25 | 水產百科網

Thisconditioniscommonlyreferredtoasthe“deathcurl”byraykeepersandthevastmajorityofaffectedspecimensfailtorecoverfromit.It'scausedbyextended​ ...

Potamotrygonidae

Has a widespread natural range covering numerous river[1] basins in Peru, Bolivia, Brazil and Argentina. These include the Rio Guaporé, Rio Beni, Rio Solimões, Rio Marañon, Rio Paraná and Rio Paraguay.

Like other members of the genus[2] it inhabits a variety of biotopes. These include sand[3] banks, the shallows of major rivers and slow moving tributaries with substrates of mud or sand[4]. It may also move into areas of flooded forest during the annual wet season and can later be found in terrestrial lakes and ponds formed by the receding flood waters.

A big adult can measure as much as 24″/60cm in diameter across the disc.

Something around 8′ x 4′ x 2’/240cm x 120cm x 60cm/1728 litres would be needed for a fully grown specimen[5]. This would...