page_title: Gugudan
section_title: 2016: Debut with Act. 1 The Little Mermaid
hierarchical_section_title: Gugudan / History / 2016: Debut with Act. 1 The Little Mermaid
caption_attribution_description: English: Gugudan on 04 Sep, 2016
context_page_description: Gugudan, also stylized as gu9udan or gx9, was a South Korean girl group formed in 2016 by Jellyfish Entertainment. The group debuted on June 28, 2016, with their EP Act. 1 The Little Mermaid. The group is composed of eight members: Mimi, Hana, Haebin, Nayoung, Sejeong, Sally, Soyee and Mina. Originally a nine-piece group, Hyeyeon left the group in October 2018.
context_section_description: Despite denying earlier reports of Sejeong and Mina debuting in a 3-member girl group in June, Jellyfish Entertainment confirmed on June 7 that the two I.O.I members would debut within the month in what would be the company's first girl group. Because of YMC Entertainment's special terms in which I.O.I's members are allowed to do activities under their respective companies while I.O.I was on break or while the group promoted in sub-units, there were no complications with the plan.
  Nayoung was also confirmed as a member on June 10 and on June 13, Jellyfish Entertainment revealed that Gugudan would be a nine-member group. On June 17, Jellyfish Entertainment announced the group name.
  On June 22, the group confirmed that they were going for a "mermaid" concept. Following the announcement, a highlight medley of the group's debut mini-album was released on June 24. They debuted on June 28, 2016 with the mini-album, Act. 1 The Little Mermaid, with "Wonderland" as the title song. Their debut showcase was held at the Yes24 Live Hall on the same day as the album's release.
  Gugudan participated in Jellyfish Entertainment's annual winter project, Jelly Christmas 2016, with their label mates Seo In-guk, VIXX, Park Yoon-ha, Park Jung-ah, Kim Gyu-sun, Kim Ye-won and Jiyul. The title track, "Falling (니가 내려와)" was released digitally on December 13, 2016.
caption: Gugudan in September 2016
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