51 wall dive sites in United States.
Biggest areas: Hawaiian Islands (9), California (7), Florida (6), Mariana Archipelago (6) and Alaska (2).
Recorded maximum depths range from 3 m to 40 m (21 of 51 sites have a depth).
By level: 11 beginner, 6 intermediate and 5 advanced.
Species confirmed at these sites by diver sightings (three or more independent divers) or by two or more independent sources, with the number of sites each is confirmed at.