Underwater authentic photography is a documentary photography genre focusing on the underwater environment. With capturing the original appearance of marine ecosystems as its core, it showcases the unique life forms and geological landscapes beneath the sea.

Its core value lies in breaking the limitations of terrestrial perspectives: it records the real state of habitats like coral reefs, deep-sea hydrothermal vents, and kelp forests, and presents the survival details of organisms such as fish, mollusks, and microorganisms. It holds both scientific recording and visual aesthetic significance, and also provides intuitive visual evidence for marine conservation.