Because they could, being gods of the ancient Greeks.
it is to do with Poseidon and the way he reacted, Zeus did not like it and he got involved to stop what Poseidon was doing and he made Poseidon stop what he was doing and do it Zeus' way.
Poseidon is Athena's uncle. Athena is the daughter of Zeus, and Poseidon is Zeus's brother.
yes he did
Poseidon is Zeus' brother.
No, as Poseidon is Zeus's brother.
Poseidon is Zeus' brother.
no, Zeus threw thunderbolts, Zeus is the god of sky, and poseidon is the god of sea so poseidon controls water, like Hades controls the underworld
no poseidon is ZEUS brother.
Poseidon is the elder brother of Zeus.
Poseidon is Zeus's older brother.
Yes, Poseidon does fight with Zeus.
Zeus doesn't trust Poseidon because maybe someday Poseidon will betray Zeus