"Koutao Fishmen! It's actually these amphibious lunatics. Could it be that the Dark Spirit in the Black Prison isn't one of the existing deities of Felen, but rather a deity created by these madmen themselves?" Serlemon exclaimed.
The most famous trait of the Koutao Fishmen in Felen was their religious zealotry. Every tribe, without exception, was governed by a theocracy, with the top ruler known as the Koutao High Priest.
This characteristic had historical reasons. They were not original natives of Felen, but rather an enslaved race that had been plundered from other worlds during the time when the Mind Flayers ruled the entire world. They had once followed the footsteps of their masters to every corner of the world, be it continents, coastlines, islands, or lakes; they were present in underground rivers as well.