615 dive sites in 64 countries have records of lionfish.
121 confirmed by two or more independent sources, 494 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 85 lionfish sites in PhilippinesDive sites in Philippines
All 16 lionfish sites in United StatesDive sites in United States
Lionfish sites in Dominican RepublicDive sites in Dominican Republic
Lionfish sites in French PolynesiaDive sites in French Polynesia
Lionfish sites in Papua New GuineaDive sites in Papua New Guinea
Lionfish sites in United Arab EmiratesDive sites in United Arab Emirates