77 cave dive sites in Mexico.
By area: Yucatan Peninsula (25), Quintana Roo (9), Yucatán (7), Sonora (2) and Veracruz (1).
Recorded maximum depths range from 5 m to 339 m (60 of 77 sites have a depth).
By level: 33 beginner, 4 intermediate, 13 advanced and 8 technical.
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.