Artificial reef building has evolved drastically over the 27 years that we have been in business. Reefs can be designed to target a specific species and provide a specific type of habitat. Walter Marine's grouper reef is designed as a grouper habitat. Dr. William Lindberg the associate professor on marine behavioral ecology at the University of Florida is the leading expert in grouper. With his input we were able to develop this very specific artificial reef. It is proven that grouper prefer a cave or ledge to dwell in. Our grouper reef is 5 ft. x 10 ft. wide and 3 ft. tall. It has a special flanged base to help prevent sinking into the sand or the seafloor. Florida limestone rock is embedded into the top of the structure to add complexity.