- Poseidon

God of the sea and of earthquakes, he is generally depicted in art wielding a trident, which is a three-pronged spear. He governs his empire with an imperturbable calm that is set up in the depths of the sea. He married Amphitrite, daughter of Doris, a sea nymph, and Nereus, a sea god. In his empire there is a few important divinities:

Triton, a sea god, son of Poseidon and Amphitrite, is depicted as having the upper parts of a man combined with a fish's tail and holding a trumpet made from a conch shell.
Glaucus, son of Poseidon and Nais, is a famous fisherman and can predict the future. He was in love with Ariadne.
Proteus, son of Oceanus and Tethys, is a prophetic sea god capable of changing his shape at will.
The Naiads, nymphs dwelling in a lake, river, spring, or fountain, are depicted as mermaids.
Scylla, a sea nymph transformed into a sea monster, believed to drown sailors navigating the Straits of Messina.