The Arkuunjujian Sea Fenrir is also a known and notorious maneater, as they are the second animal with the most humanoid kill ratio, on Arkuunjuji.

Their first time was during the beginning of the Early Succession Kings Monarchy, and they were a group known as Herpetocynotheres, and they were successful until the arrival of more advanced Earth Amphicyonids also known as the Teratolyconidaes came in, and almost drive them near extinction.