Poseidon only had 1 symbol.The trident.
Poseidon -Greek god of Horses, Earthquakes, Storms and the Sea. His symbols are horses, sea foam, dolphins, and a trident.
the function of Poseidons temple was for Poseidons honor.
Rhea.
cronus
Neptune
Cronus and Rhea
Triton
a trident
Rhea.
He doesn't had friends
Give it back to Poseidon.
In myths, he does not have one.