Ksyantos

Ksyantos is an ancient beast of Whirn, one of the few aquatic ancient beasts that still exist. He is a giant sea serpent covered in jet-black scales of Leviathite, and his blood is famously bright green. According to legend, the sea is stained green from his blood which streams from the wound given to him by Vyor Bréganok.

Other Names
The Valkavians call him Jokosz.

The Yidvians call him Ganyuž-Kar (meaning big bad serpent).