Study Finds Most Scuba Diver Reef Contact Is Unintentional

Video analysis of 732 scuba divers showed they touched coral reefs about once every four minutes on average. Roughly 60 percent of those contacts occurred without the divers realizing it. Researchers collected both underwater footage and post-dive surveys between December 2022 and January 2024 at sites across Indonesia and the Philippines.

After each dive, participants were asked to estimate how often they contacted the reef.

Seventy-five percent of divers rated their own skill and reef-avoidance ability above average. The same group contacted the reef five times more often than they estimated. Wildlife sightings increased the rate of damaging contact by more than double. On heavily visited reefs, the cumulative effect of repeated minor contacts could produce measurable ecological change.

Fifteen percent of observed divers made no contact with the reef at all. Marine ecologists cited this group as evidence that improved training and regulation could reduce impacts without restricting access. Reef tourism generates revenue that supports local conservation efforts. Researchers stated the objective is to reduce accidental contact rather than limit diving activity.