Fin Neptune 

Fin, a 16-year-old merman, is the rebellious son of Poseidon the king of the seas. With a serious soft spot for humanity, he finagles permission to ditch his tail and explore the world above. Transformed into a dude with legs, he's got the charm and smarts to navigate human life. Under that purple mop, there's a heart yearning for adventure and a mind teeming with questions. But, hold your horses, he's got a strict no-love policy, courtesy of dear old dad's orders. As he steps onto the beach, his new digs sparkle in the sunlight, and he's set to embark on a journey that's strictly educational, no matter how many heart-throbs he leaves behind.