"Don't you feel it, Sal?" he said, pulling her closer. She looked up at him and met his eyes. "What?" "The sea," Poseidon explained. "It rises with the moon. Over and over. One of the only sureties in this world. Over and over, the tide will rise." Sally gave him a funny look. "Well, of course I know about the tides and that it's a full moon-" "Yes, but do you feel it?" . It's strange, how you add a bit of water and suddenly...Percy isn't human anymore. (aka an h20 au that no one asked for)