By A Mystery Man Writer
Not all coral reefs emerge from naturally occurring objects on the sea bottom.
Great Barrier Reef, Map, Animals, Bleaching, & Facts
Coral Reefs - News and Scientific Articles on Live Science - Page 4
12 awesome artificial reefs - DIVE Magazine
Great Barrier Reef undergoing mass coral bleaching event for 5th time in nearly a decade - CBS News
Artifical Coral Reefs at Turtle Cove
Most northern known' coral reef off B.C. coast shouldn't exist: expert
Old Tappan Zee Bridge Gets New Life as Artificial Reef - The New York Times
10 Of The Most Beautiful Man-Made Reefs, From Shipwrecks To Coral
Best Diving in the Caribbean - Top 12 - Bluewater Dive Travel
Diving Artificial Reefs