Since Poseidon is a god from Ancient Greek, there are no records or stories of what Poseidon fears, and most people do not believe in Greek gods anymore. However, since he is immortal, my guess would be being tortured and placed in Tartarus.
Poseidon does not fear Zeus, he respects his older brother because he is the king of the gods in Greek Mythology (Zeus is Jupiter, Poseidon is Uranus in Roman mythology).
Poseidon feared nothing.
a war of the gods
Quite possibly, as Cronus the father of Poseidon swallowed him shortly after birth.
a war of the gods
Poseidon was afraid of this brother Zeus. (actually, he was afraid of the sky, because Zeus ruled it.. )
Poseidon ruled in the sea which surrounds the entire city of Greece and he was considered the god of the seas
Sailors feared Poseidon, because they believed him to be the cause of earthquakes.
The people of Athens were afraid of Poseidon because he was the god of the sea, earthquakes, and horses, and they believed he could unleash destructive forces upon their city. His temperament was unpredictable, and he was known for his wrath when not properly honored. Additionally, the competition between Poseidon and Athena for the patronage of the city heightened their fear, as Poseidon threatened to flood the land or create disasters if he was not favored. Thus, the Athenians sought to appease him to avoid his wrath and ensure their city's safety.
Poseidon's Greek name was Poseidon. Poseidon's Roman name was Neptune.
he is poseidon
No, Zeus is. Poseidon is god of the sea