Full cast of The Mermaid Prince

Moon Bin

Choi Woo-hyuk

16 episodes

Chae Won-bin

Jo Ah Ra

10 episodes

Hwi Young

Yoon Gun

10 episodes

Moon Sang-min

Jo A-seo

10 episodes

Yoon Seo-bin

Yoon Jae-beom

10 episodes

Jung Bo-min

Ma Li Ah

10 episodes

Yoo Na-gyeol

Oh Yoon-yeong

10 episodes

Jeong Sin-hye

Shin Hye Ri

6 episodes

Kim Hong-bin

Jang Na-yeon

6 episodes

Baek Jae-min

Kang Moon-seok

6 episodes

Park Tae-in

Han Seung-min

6 episodes