Poseidon, the god of the sea, with his trident.
He is associated with dolphins and three-pronged fish spears (tridents). Poseidon lives in a palace on the ocean floor, made of coral and gems, and he lives there with his wife, Amphitrite.
Poseidon has been called “the tamer of horses” due to his role as the creater of horses; At one point Poseidon 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 unsuccessful and created a varity of other animals. By the time the horse was created, his passion for Demeter had cooled.
In Greek art, Poseidon rides a chariot that was pulled by a hippocampus or by horses that could ride on the sea.