Paul used to live in a village with two ways of life, Modernizm and Spiritualism.
Moderners are just Fishmen, who choose a 20th Centry style of living, with economy, hard work, stuff like that.
Spiriters are just traditionaliats, who are all about preserving Fishmen History. They worship the ocean, obviously.

Philip is Paul's Dad boss and a current mayor of the Fishman Village.
Ocean Sun used to be the main leader, but he's now more of a priest.

That's all you need to know.