Anthony Wong

Alan Tam

Dolphin Chan Hoi-Hang

Dolphin / Shark

Parkman Wong Pak-Man

Officer Lee Sau

Lawrence Ng Kai-Wah

Wong Yu Yan, Anthropologist

Teddy Yip Wing-Cho

Dolphin's Dad

Dayo Wong Chi-Wah

Dr. Wong

Perrie Lai Hoi-San

Whale

Lee Chung-Wai

Sean Lau

Joe [cameo]

Chang Gan-Wing

Library Cleaner [cameo]

Herman Yau

Bobby Yip Kin-Sang

Wong Lap-Wai

Lee Man-Piu

Quinton Wong Liu-Che

Benny Lam Diy-Kuen

Hau Woon-Ling

Tony Leung Hung-Wah