Divers are essentially tourists who love coral reefs and invest a lot of time and effort in watching them. Unfortunately, divers also cause damage to corals, often unintentionally, by disturbing and resuspending sand, touching them, hitting them with their equipment, and scaring fish away. Artificial reefs have been proposed as a means of diverting diving pressure from the natural reef to alternative sites, thus preserving both dive tourism and the coral reef.