Kenkou Zenrakei Suiei-bu Umishou
Genres: Comedy, Sports, Ecchi
Type: TV, Episodes: 13
Aired: Jul 4, 2007 to Sep 26, 2007
Studio: Artland
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
Kaname Okiura, a student of Prefectoral Umineko Shougyou High ("Umishou" for short), joined the school's swimming club in order to learn how to swim, but the club is filled with weirdos, let alone who can teach him swimming. Then, a sunny, happy-go-lucky girl named Amuro Ninagawa who transferred from Okinawa joined the club. Her extraordinary underwater speed and unorthodox swimming style (plus her personal habit of nude swimming—a powerful magnet to teenage boys) surprised every club member, especially Okiura, because she reminds him of a mermaid-like creature he saw only once in his early childhood.

(Source: ANN)