Poseidon, best known as the mythological Greek god of the sea, is from an extremely powerful family. The powers of the world were said to be divided between him and his celebrity brothers Zeus, god of the sky and Hades, god of the underworld. Poseidon is also the god of horses and earthquakes. Neptune, the Roman sea god, is inspired from this mythological character. The dolphin, trident and three-pronged fishing spear are all symbols associated this aquatic deity.