<p>The Florida Keys are a chain of islands extending 320 km (199 mi) along the southern edge of the Florida Plateau from Biscayne
Bay to the Dry Tortugas (101 km [63 mi] west of Key West). The Florida Reef Tract, a band of living coral reefs paralleling
the Keys, extends from Fowey Rocks to the Marquesas and includes about 130 km (81 mi) of bank reefs and 6,000 patch reefs.
For convenience, the Keys can be divided into the upper, middle, and lower Keys (Fig. 1).</p><p>The environmental and economic
importance of the Florida Keys is indicated by the many protected or regulated areas, which include several national wildlife
refuges, national parks, marine sanctuaries, and state-protected areas (Fig. 1). Because many recreational and commercial
activities occur in nearshore habitats, these areas have high potential for environmental damage.</p><p>Relatively high rates
of human population increase (28%-44%) are predicted over the next 20 years in some parts of the Keys; Monroe County, which
includes all of the Keys, had a population growth of 160% during the past 40 years. Human activities associated with increased
population growth may well ultimately disrupt the Florida Keys marine ecosystem and damage the area's overall economy. In
recognition of this possibility, the Florida Keys National Marine Sanctuary was designated in 1990 under the Marine Protection,
Research, and Sanctuaries Act, U.S. Public Law 101-605. The sanctuary includes 9,515 km<sup>2</sup> (3,673 mi<sup>2</sup>)
of coastal waters around the Florida Keys. The Sanctuaries and Reserves Division of the National Oceanic and Atmospheric Administration
was charged with developing a comprehensive management plan and regulations to protect sanctuary resources (NOAA 1995). We
focus on the current status of Florida Keys reef fishes and areas where research is needed immediately.</p>