* BestKnownForTheFanservice: In volume 1's side notes, the author comments that, although chapter 3 introduces Rina and Yuuri, the only thing people seem to want to talk about is Kaito's ShowerScene.
* CrowningMusicOfAwesome
* DeaderThanDisco: Seems to have this status in the American magical girl fandom. Averted in Europe, as said below.
* DieForOurShip: Poor Michal.
* EnsembleDarkhorse: Rina, Sara and the Black Beauty Sisters.
* EvilIsSexy: Gaito, The Dark Lovers, Black Beauty Sisters, Sara, Michel and the Winged Ones.
* GermansLoveDavidHasselhoff:
** This show has a surprising number of fans in Europe, which begs the question why no TV station wants to air the show anymore.
** The series is specially loved in Spain and Italy, where it is actually better remembered than more successful magical girl series like the mighty ''Anime/FutariWaPrettyCure''.
* HarsherInHindsight: One thing ''no one'' wanted to talk about when the series aired. The entire plot -- both the villains' plan and the Lucia/Kaito love story -- starts because of a tsunami in the Indian Ocean, which killed Kaito's parents and destroyed the orange mermaid country. A certain real-life tsunami in the Indian Ocean with a similarly high death toll happened the day the anime ended.
* HilariousInHindsight: The seven mermaid races share their colors with seven of the eight Fairy Tones from ''Anime/SuitePrettyCure'', and given the whole idol shtick... Hell, there's even a love interest to one of the main characters voiced by Creator/DaisukeKishio.
* {{Padding}}: Transformation sequences.
* PeripheryDemographic: Teenage girls, especially in the Western audience.
* {{Narm}}: The Baby/Coral Fairy from episode 36.
* SnarkBait: Has this reputation among many modern manga readers, due to the similarities it has to something you'd see on DeviantArt.
* {{Squick}}: Some see the fanservice as this, considering the series is still technically aimed to little girls, and most of the characters are around 13.
* StrangledByTheRedString: Caren with Subaru, an anime-only character probably introduced only so people would stop slashing her with her sister.
* SuspiciouslySimilarSong: Some European dubs utilize a limited repertoire of songs for several characters. For instance, Lady Bat and the Black Beauty Sisters share songs in some of those versions.
* ThatOneBoss: "Aurora no Kaze ni Notte" in the video game ''Pichi Pichitto Live Start''.
* ViewerGenderConfusion: Lady Bat, although officially male, causes a ''lot'' of confusion between fans. Probably justified (and probably invoked) because he's also a [[CreepyCrossdresser crossdresser]].
* WhatDoYouMeanItsForKids: The more suggestive and bloody manga is rated "13+" in North America, where the AnimationAgeGhetto compels manga publishers to put ratings on their books, yet it was originally published in ''Nakayoshi'', a magazine for little girls.
* WhatDoYouMeanItsNotSymbolic: The religious imagery in Lucia's name.
* {{Woolseyism}}:
** The Italian dub. The voice acting is great, and the songs are possibly, even better than the Japanese ones. They completely substituted J-pop music for much more pop-rock, and rewritten the lyrics to match the new song. [[http://www.youtube.com/watch?v=ABYYYaI9A-4 Check]] [[http://www.youtube.com/watch?v=I_7gjazsNEU&feature=related it]] [[http://www.youtube.com/watch?v=zpUnhODes24&feature=related out]] [[http://www.youtube.com/watch?v=hC9hRl1E9UQ&feature=related yourselves]].
** Some countries made Noel's color Indigo, as Aiiro (Deep-Blue), would be hard to translate, and make her too similar to Hanon. Technically, Hanon is aquamarine/turquoise, and not blue, but this often had to be changed too.
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