When the corpse of Kos washed ashore, the villagers used the parasites they gathered from her as fuel. The parasites, however, transformed them into the monstrosities they are currently. When scholars at Byrgenwerth caught wind of this hamlet, they sent hunters to the village. The hunters butchered the villagers and searched their skulls for eyes on the inside. Afterwards, Kos cursed every hunter and created the Hunter's Nightmare. These Fishmen now live on in the heart of the nightmare.
- Fishmen are marked by two inherent facts in terms of combat: They are all extremely weak to Fire and are very resistant to Bolt damage. It is something shared across all of them.
- Fishmen have a somewhat alien appearance, but are not Kin despite this, as evidenced by their resistance to Bolt.