Poseidon himself is one of the original mythical Greek gods. He is considered the king of the oceans and is usually also known for causing earthquakes and being a tamer of horses.
A myth.
Poseidon is a myth.
In ancient Greek myth, Poseidon did not die.
No Zeus did not kill Poseidon in Greek myth.
Poseidon.
In Greek myth Poseidon has had both sons and daughters.
No myth gives the birth-day or year of Poseidon's life.
No myth states that the marriage of Poseidon and Amphitrite ended.
Here is one myth that he is in. Its the myth where Athena (Goddess of War and Wisdom) and Poseidon competed to be the patron of the Greek city Athens. Athena won the contest,though Poseidon's offering was very powerful.
Not in Greek myth.
Neptune
Greek myth does not say.