Ortenax

Cortenans, Ertanax, Ordereus, Ortenaus, Orteniaus, Ottonax

A magical species of fish from the Euphrates river.

A rib bone from the Ortenax formed one half of the crosspiece on the Sword with the Strange Hangings. Anyone touching the rib would forget all his joys and sorrows until he released it.


Sources
Vulgate Queste del Saint Graal | 1215-1230
Vulgate Estoire del Saint Graal | 1220-1235
Le Morte Darthur | Sir Thomas Malory, 1469-1470