The Idle Mermaid is a 2014 South Korean romantic comedy television series starring Jo Bo-ah, On Joo-wan, Song Jae-rim, and Park Ji-soo. A modern retelling of the 1837 fairy tale "The Little Mermaid" by Hans Christian Andersen, it aired on tvN from August 7 to October 9, 2014 on Thursdays at 23:00. Originally slated to run for 14 episodes, the total number of episodes was reduced to 10. The series inspired an unofficial Indonesian adaptation called Mermaid in Love.

Jo Bo-yoon, commonly known as Jo Bo-ah (조보아), is a South Korean actress. She is known for her roles in Goodbye to Goodbye (2018), My Strange Hero (2018), Forest (2020), Tale of the Nine Tailed (2020), Military Prosecutor Doberman (2022), and Destined With You (2023).