Manboshi

Manboshi is a moonfish merman and the third son of the royal Neptune family on Fishman Island. He and his two older brothers, Fukaboshi and Ryuuboshi, were first seen when they went to Mermaid Cove, investigating the illegal entry. He has a habit of saying "Akkamanbo", and apparently likes to dance. Like Ryuuboshi, he sings when he talks, except he doesn't sing a scale.