Pearl Clan,
After Berion prepared the faith altars for each of Claus' tribes, Lis spent several days touring the various tribes of the Treasure Pearl Fishmen.
One aspect was to showcase the legendary power of Fishman Claus and plant the seed of awe in the hearts of the fishmen.
The other aspect was to infuse Lis' elven imprint into the prepared faith altars, connecting each altar to Lis.
Faith altars are places where the Fishman tribe prays and worships, similar in function to the human churches.
Among the entire Fishman tribe, only the Coral Tribe has a Church of the Ocean Goddess, and the act of Fishman Claus establishing faith altars hasn't been opposed by the Church of the Ocean Goddess.
For the Church of the Ocean Goddess, they don't intervene in the internal faith of the fishmen unless there is something unusual.
As long as no other church tries to encroach upon the Fishman tribe's faith, it's fine.