Our second Greek god is Poseidon... here is some more info on this great god:
Poseidon: Poseidon is the brother of Zeus. His prize was to become lord of the sea. He was widely worshiped by seamen.
He married Amphitrite, a granddaughter of the Titan Oceanus.
At one point he desired Demeter. To put him off Demeter asked him to make the most beautiful animal that the world had ever seen. So to impress her Poseidon created the first horse. In some accounts his first attempts were unsucessful and created a varity of other animals in his quest. By the time the horse was created his passion for Demeter had cooled.
His weapon is a trident, which can shake the earth, and shatter any object. He is second only to Zeus in power amongst the gods. He has a difficult quarrelsome personality. He was greedy. He had a series of disputes with other gods when he tried to take over their cities.