From Unofficial Handbook of the Virtue Universe
The All Father... Lord of all in his domain. Poseidon is the God of the Sea, and all that dwell within it are either his children or are known to him. Virtually every creature within the great blue, understand and revere, or sometimes loathe this being of awesome power.
He is the Creator of a world of Primal majesty and Absolute darkness, and the beings within his realm are often as deadly as they are beautiful.
There are Priesthoods or cults within most Intelligent beings civilizations that pay tribute and worship Poseidon. A few of these people's actually enjoy a boon of his primal majesty for their devotion, granted control over elemental forces. Many view him as "the Sea" that he is everywhere, in everything, and that everything within the ocean is a part of him.
Poseidon is "directly" seen as a Fatherly figure of many Iconic characters throughout History, some examples include... Triton, King of the Atlantic Merfolk... Polyphemus, the Cyclops from the Odyssey, Theseus, Slayer of the Minotaur, etc...