'Healthy All-nude Swim Team Seacats Commerce High') is a Japanese manga series written and illustrated by Mitsuru Hattori.

A 13-episode anime television series, produced by Artland and directed by Kōichirō Sōtome, was broadcast from July to September 2007.

There, Kaname Okiura, a student in his second year of high school, attends Prefectural Umineko Commercial High School (県立海猫商業高等学校, Kenritsu Umineko Shōgyō Kōtō Gakkō), or Umishō (海商) for short.

One of these is a cheerful, sunny, happy-go-lucky girl named Amuro Ninagawa, a transfer student, and the other is her father.

[8] An internet radio version of the anime series, Kenkō Zenrakei Suieibu Umishō: Junbi Undō (ケンコー全裸系水泳部 ウミショー 準備運動), was first streamed on the Japanese websites Ōnsen and BEWE from May 16 to June 27, 2007.