The Perdido Key Reef was built in 2014 and is comprised of 24 modules of Ecosystem by Reefmaker artificial reef modules made in Gulf Shores, AL. The are constructed by attaching concrete disc covered with limestone to fiberglass pilings which are driven into the sand. The rows are 20′-25′ apart and extend about 280′. The depth is roughly 12′-15′ with the reef modules sitting approximately 6′-8′ below the surface. The artificial reef serves as a habitat for many species of tropical fish. Sea turtles are commonly spotted resting in the sand under and around the reef modules. Average visibility at this site is 10-20′ but varies drastically with sea conditions. When conditions are good and seas are calm upwards of 30′ visibility is common.