The San Diego Oceans Foundation is a 20 year old, non-profit organization devoted to the stewardship of the region's marine waters and their living resources.
The Foundation conducts various projects with volunteers and balances ocean user needs with environmental protection.
The primary programs revolve around enhancement, water quality, and education for the benefit of users of the ocean, San Diego's finest resource.
Artificial Reefs
Artificial reefs, quite simply defined, are "one or more objects of natural or human origin deployed purposefully on the seafloor to influences physical, biological, or socioeconomic processes related to living marine resources" (Seaman, 2000).
However their use, spanning centuries from the Romans to present day, has been anything but simple; ranging from natural barricades for blocking pirate ships to attracting fish to promoting diving industries to improving water quality.
The material used to create artificial reefs has also been broad, extending from warships to trolley cars to oil structures to even a commercial passenger jet.
Source: http://www.sdoceans.org/