Overview
- Researchers led by Bing Lin published a peer‑reviewed study in Conservation Letters drawing on underwater video and post-dive questionnaires from popular reefs in the Philippines and Indonesia collected between 2022 and 2024.
- Video observation recorded thousands of reef contacts during more than 300 hours of footage, with divers touching reefs on average about once every four minutes and nearly half of touches leaving visible damage.
- Divers substantially underestimated their impact, reporting roughly one‑fifth the number of contacts seen on video, and about three in four rated their ability to avoid reef contact as better than others.
- Encounters with fish or other wildlife and the use of cameras, gloves or pointer sticks were linked to much higher contact rates, and divers copying each other’s behavior also increased risk of damage.
- The authors say the results offer clear, practical targets for managers and operators such as focused pre‑dive training, stricter rules on equipment use, and higher industry standards to help reduce tourism‑driven reef harm while protecting local livelihoods.