» Art-Reef Ltd    This company provide two solutions to create artificial reefs - pyramidreef and art-reef.    http://www.art-reef.com/

» Global Coral Reef Alliance    Non-profit organization committed to coral reef preservation -- news, issues, projects, online papers.    http://globalcoral.org/

» Reef Ball Development Group Ltd.    Extensive information about artificial reefs designed to restore ailing coral reefs and to create new fishing and scuba diving reefs.    http://www.reefball.com/