Anthony Wong Chau-sang

Alan Tam

Dolphin Chan Hoi-Hang

Dolphin / Shark

黃柏文

Officer Lee Sau

吳啟華

Wong Yu Yan, Anthropologist

葉榮祖

Dolphin's Dad

黃子華

Dr. Wong

黎海珊

Whale

Lee Chung-Wai

劉青雲

Joe [cameo]

曾近榮

Library Cleaner [cameo]