Poseidon:
God of the sea, rivers, floods, droughts, and earthquakes. He is a son of Cronus and Rhea and brother to Zeus and Hades. He rules one of the three realms of the universe as king of the sea and the waters. In classical artwork, he was depicted as a mature man of sturdy build with an often luxuriant beard, and holding a trident. The horse and the dolphin are sacred to him. His wedding with Amphitrite is often presented as a triumphal procession. There are some stories that specify an affair with Medusa which led to her giving birth to Pegasus from her neck when Perseus sliced her head. His symbols are the trident, horse, dolphin, fish and bull. His Roman counterpart was Neptune.http://en.wikipedia.org/wiki/List_of_Greek_mythological_figures#Major_gods_and_goddesses