Actinoscyphia liui is a deep-sea sea anemone (family Actinoscyphiidae) described from deep-water environments in the western Pacific. Like other Actinoscyphia species, it is a large, solitary polyp with a broad oral disc and robust tentacles adapted to capturing prey including crustaceans and fish in low-food deep-sea environments. It is one of the few deep-sea anemone species with available genomic data, important for understanding molecular adaptations to extreme environments.