"Standby, cue! Hello, we are Gugudan!" gugudan (구구단) is an eight-member girl group under Jellyfish Entertainment. Originally as nine, they debuted on June 28, 2016 with the mini album "Act.1 The Little Mermaid". Their name stands for 'multiplication table' in Korean, and represent the nine different charms of each member. In January 2016, members Nayoung, Sejeong, and Mina represented their company in survival reality show, Produce 101, and all three managed to make it to the finals together. In the end, only Sejeong and Mina were the only one to make it to the final lineup of I.O.I, debuting afterwards. On December 30, 2020, Jellyfish Entertainment announced that the group would be ending their activities on December 31.