Based on the description, what god is cabin three dedicated to in The Lightning Thief?

I believe that this question is asking about the cabin description that readers get in chapter six. Percy is told that each of the twelve cabins is for each of the twelve Olympians.
As Percy examines cabin number three, readers are told that it is long, low, and solid. The walls are studded with coral and seashells, and Percy is given the feeling that the walls came straight from the ocean floor. There is also a strong scent of salty air about the cabin.
Based on the salt smell and ocean hints, readers are likely to infer that the cabin belongs to Poseidon. Poseidon is the Greek god of the sea, storms, earthquakes, and horses. His Roman god counterpart is Neptune. He is the son of Cronus and Rhea and the brother to Zeus and Hades.