Poseidon is one of the main Gods in Greek Mythology, he is the god of the seas, horses, and water. He is the brother of Zeus and Hades and is found in Mythology Island.
Zeus eventually reveals that he is going to overthrow Poseidon and Hades and rule all of Poptropica. Poseidon will give you his trident, which will aid you in battle with Zeus. To reach him, you must go to the Grove of Temples. In his temple, use the starfish as an offering to enter his realm. Go to his beach, and swim down into the ocean maze. Hercules must move the rock that blocks the entrance.
He also appears as a minor character in Super Villain Island, where he rises out of the sea to give you his trident once more so you can defeat Zeus again.
Gallery
Poseidon in Super Villain Island
Trivia
Poseidon appears much smaller in Super Villain Island than Mythology Island, though being a god, he is probably able to change size at will.
Even if you have obtained Poseidon's trident in Mythology island, Poseidon will still be seen carrying it in Super Villain island.
Garden Of The Sphinx | Grove of Temples | Hades' Realm | Hades' Throne | Hydra's Cave | Labyrinth Entrance | Labyrinth | Main Street | Mount Olympus | Pit of Hades | Poseidon's Beach | Poseidon's Realm | Poseidon's Throne | River Styx | Tree Base | Tree Top | Zeus' Throne