1071 dive sites in 74 countries have records of octopuses.
180 confirmed by two or more independent sources, 891 reported by one source.
Sites are ranked by evidence: first by how many independent divers logged the animal there, then by how many independent sources confirm it. "Best" here means most independently confirmed, nothing more.
All 83 octopus sites in United StatesDive sites in United States
All 59 octopus sites in PhilippinesDive sites in Philippines
All 17 octopus sites in South AfricaDive sites in South Africa
All 11 octopus sites in United KingdomDive sites in United Kingdom
Octopus sites in Dominican RepublicDive sites in Dominican Republic
Octopus sites in U.S. Virgin IslandsDive sites in U.S. Virgin Islands