A 91-episode anime series was produced by TV Aichi, divided into two seasons, aired in Japan from April 2003 to December 2004.

Lucia Nanami, the mermaid princess of the North Pacific Ocean, sets out on land to find the boy that she had saved from a tsunami wave seven years before the beginning of the story, with whom she fell in love and had entrusted her pink pearl.

At the same time, Lucia has been told that a group of water demons have invaded the sea world and she must gather six other Mermaid Princesses and their pearls to bring back the legendary goddess Aqua Regina to stop them.

To fulfill this, she joins forces with Hanon and Rina, the Mermaid Princesses who came up to dry land, use their pearls, turn into singing teen idols, and use their voices as an offensive power.

The original manga, created by Yokote with illustrations by Hanamori, began serializing in the September 2002 issue of Nakayoshi.

ADV Films acquired the license to the anime in June 2004 for its North American release,[3] but was eventually dropped due to difficulty in finding backers and securing a TV airing deal.

In addition, some foreign dubs such as Spanish and French dubbed versions was translated from the unreleased ADV Films' English-dubbed version as a reference when Elastic Rights acquired the licensing rights to Mermaid Melody Pichi Pichi Pitch from Kodansha in Spain, Portugal, Greece, Cyprus, Turkey and French-speaking Europe and Africa.

For 29th to the 52nd episodes, "Rainbow Notes♪" by Kanbe and "Sekai de Ichiban Hayaku Asa ga kuru Basho" (世界で一番早く朝が来る場所, lit.

All songs listed below are compiled in several character singles, soundtrack, and vocal albums (which also include the theme songs listed above): Three video games (developed by Konami Computer Entertainment Japan) were released on Nintendo's Game Boy Advance console during the original run of the anime.

Meanwhile, Anime News Network's Melissa Harper managed to only review the second volume of the manga and commented that while it has good visuals, its story is too childish in some of its elements.