AMERICA'S MARINE SANCTUARIES tells the story of fourteen underwater places so important they are under special protection, together forming the US National Marine Sanctuary System. These sanctuaries, spanning more than 620,000 square miles and ranging from the Florida Keys to the Great Lakes and to the Hawaiian Islands, are critical and breath-taking marine habitats that provide homes to endangered and threatened species. They, also, preserve America's rich maritime heritage and act as living laboratories for science, research, education and conservation, offering outdoor recreation experiences for all ages. Through 150 full-colour photographs and lively narrative, AMERICA'S MARINE SANCTUARIES showcases each of the marine sanctuaries and the creatures that live there, from whales and manatees to Hawaiian monk seals and Laysan ducks, as well as sunken ships from the Ghost Fleet and USS Monitor to Shipwreck Alley. The book underscores how marine sanctuaries have shaped the nation's development, survival, and identity and celebrates these protected underwater treasures for all they can tell us about our communities, our country and our world.

The Monterey Bay National Marine Sanctuary is the largest or thirteen marine sanctuaries administrated by the United States Department of Commerce National Oceanic and Atmospheric Administration.

This "condition report" provides a summary of resources in the Thunder Bay National Marine Sanctuary (sanctuary)1, pressures on those resources, current conditions and trends, and management responses to the pressures that threaten the integrity of sanctuary resources. Specifically, the document includes information on the status and trends of water quality, habitat, living resources and maritime archaeological resources, and the human activities that affect them. It presents responses to a set of questions posed to all sanctuaries (Appendix A). Resource status of Thunder Bay is rated on a scale from good to poor, and the timelines used for comparison vary from topic to topic. Trends in the status of resources are also reported, and are generally based on observed changes in status over the past five years, unless otherwise specified.

Artificial reefs are human-made structures that are either deliberately or unintentionally submerged underwater, commonly with the result of mimicking some characteristics of a natural reef. Artificial reefs alter local habitat by providing hard substrate and complex vertical relief where typically none previously existed (Bohnsack and Sutherland 1985, Sheehy and Vik 1992, Sheehy and Vik 2010). They may be created from a variety of sources and materials including the intentional sinking of ships and barges, rubble, concrete, rocks, stone, boulders, steel, and metal, etc. (Baine 2001). They may also be created through unintentional means (e.g., shipwrecks that can become historical in nature) and through structures built for other purposes (e.g., decommissioned oil and gas platforms, breakwaters1, jetties, bridges, offshore lighthouses, air force towers, navigational aids, marine data buoys, etc.). These various materials have benefits and drawbacks when used in artificial reef construction.