The Reefmaker - Walter Marine deployed its first artificial reef in 1986. Today they are the largest reef builders in the United States with over 70,000 reefs deployed. All of our artificial reefs feature our patented design of natural reef like material. These artificial reefs provide a habitat for all forms of marine life, from juveniles to adults. The reefs are durable enough to withstand hurricane 5 force winds and waves. These limestone reefs can be created in any size, including the largest available in the US. There are four divisions of reefs: fishing reefs, snorkeling reefs, wave attenuators, and ships.