he is god of the sea
In myths, he does not have one.
There are too many to name, also myths do not always coincide. It is still undecided wether or not Theseus was a son of Poseidon.
the function of Poseidons temple was for Poseidons honor.
Rhea.
cronus
Cronus and Rhea
Neptune
a trident
Triton
Rhea.
Swimming, fishing and women.
He uses a Trident.