Of Poseidon by Anna Banks

Galen is the prince of the Syrena, sent to land to find a girl he's heard can communicate with fish. Emma is on vacation at the beach. When she runs into Galen — literally, ouch! — both teens sense a connection. But it will take several encounters, including a deadly one with a shark, for Galen to be convinced of Emma's gifts. Now, if he can only convince Emma that she holds the key to his kingdom . . .

Told from both Emma and Galen's points of view, here is a fish-out-of-water story that sparkles with intrigue, humor, and waves of romance.