Poseidon (ポセイドン)

Poseidon is an ancient weapon mentioned in a Skypiea poneglyph. Unlike Pluton, not much is known about this weapon or it's abilities. Neither does the World Government know it came to rest. It may be hidden somewhere in Jaya or the upperyard, but with the amount of information that has been revealed thus far, anywhere could be a possibility.

In Greek mythology, Poseidon (aka. Neptune in Roman), is the god of the sea and horses. Aside from his control over the blues seas, he is also said to have a role in causing earthquakes. Sailors who were to set off would often pray to Poseidon for a safe voyage.

Refer to this page for more information.