Florida Coral Reef Tract — Florida

Florida's Coral Reef — formally designated under that name by the State of Florida — is the only living coral barrier reef in the continental United States and the third-largest barrier reef ecosystem in the world, according to NOAA Fisheries. The reef extends more than 350 nautical miles from the St. Lucie Inlet in Martin County southward through the Florida Keys and west to the Dry Tortugas in the Gulf of America. It supports more than 500 species of fish, invertebrates, and plants, and its spur-and-groove formations, patch reefs, bank reefs, hardbottom communities, seagrass meadows, and mangrove habitats form an interconnected coastal ecosystem.

The reef exists in an intensely developed coastal context. The Florida Department of Environmental Protection notes that the five counties bordering the reef are home to more than 6 million people, and describes South Florida's economy and way of life as inextricably linked to the coral reef ecosystem. Despite that recognized value, NOAA estimates that healthy coral cover has declined by approximately 90 percent since the late 1970s, driven by Stony Coral Tissue Loss Disease, thermal bleaching events, water quality degradation, and hurricane impacts. The summer of 2023 produced the most intense marine heat event on record for the reef, triggering what NOAA has characterized as the functional extinction of two reef-building coral species in Florida waters.

The reef tract is administratively divided into two principal regions. The northern third, spanning approximately 110 miles, falls within the Southeast Florida Coral Reef Initiative (SEFCRI) region, which covers Miami-Dade, Broward, Palm Beach, and Martin counties and is managed primarily by the Florida Department of Environmental Protection. SEFCRI was established following the U.S. Coral Reef Task Force's formation in 1998 and its 2000 National Action Plan. Under DEP's jurisdiction, the northern section is designated the Kristin Jacobs Coral Reef Ecosystem Conservation Area.

The southern two-thirds of the reef lie within or adjacent to the Florida Keys National Marine Sanctuary (FKNMS), designated in 1992 and jointly managed by NOAA and the State of Florida. In December 2024, NOAA finalized the Sanctuary's Restoration Blueprint — its first management plan update since 1997 — expanding the sanctuary boundary by 20 percent, from 3,800 to 4,539 square miles, and adding 37 new marine zones. At the reef's northern and western termini, Biscayne National Park and Dry Tortugas National Park provide additional federal protection. Overlapping statutory frameworks governing the reef include the Florida Keys National Marine Sanctuary Act, the Endangered Species Act, and Florida's Aquatic Preserve system, with management responsibilities distributed among NOAA, the Florida DEP, the Florida Fish and Wildlife Conservation Commission (FWC), the National Park Service, and the U.S. Fish and Wildlife Service.

The economic dimensions of Florida's Coral Reef are documented across multiple federal and state sources. Florida's state reef resource site estimates the reef generates $1.1 billion in annual tourism value and supports 71,000 jobs in South Florida. NOAA Fisheries reports that reef-dependent activities in the Florida Keys alone support nearly 20,000 local jobs tied to tourism, fishing, and ocean recreation, generating more than $2 billion annually for the Keys region. A 2022 study in the journal Fisheries Research by Jerald Ault, a University of Miami emeritus professor, found that fishing supported by reef habitat generates $6 billion annually, as reported by National Park Traveler in February 2026. In 2000–01, NOAA Fisheries documented that Florida coral reefs contributed over $4.3 billion in sales and $2 billion in income statewide.

The reef's flood-protection function carries its own documented fiscal weight. The Florida DEP reports, citing a 2019 study by Storlazzi and colleagues, that Florida's Coral Reef provides more than $355 million per year in flood protection benefits to buildings and shields nearly $320 million in annual economic activity. The U.S. Geological Survey has quantified the risk of further degradation: a one-meter loss in reef height would expand Florida's 100-year floodplain by 20 square kilometers, imperiling 24,000 additional people and $2.9 billion in property and economic activity. The reef also carries Essential Fish Habitat designation under federal fisheries law, and associated hardbottom communities serve as larval settlement and juvenile nursery habitat for commercially important species including grouper, snapper, spiny lobster, and blue crab.

The most acute biological threat documented on Florida's Coral Reef is Stony Coral Tissue Loss Disease (SCTLD), first identified in fall 2014 near Virginia Key in Miami-Dade County. FWC's Fish and Wildlife Research Institute describes SCTLD as a previously undescribed disease that spread north and south from its origin point, reached the northern reefs in Martin County by 2017, and arrived at Dry Tortugas National Park by late spring 2021. The Florida DEP reports that SCTLD progresses year-round with no indication of seasonality. FWC documents that nearly half of Florida's 45 stony coral species are affected, with particularly severe impacts on Endangered Species Act-listed species: Dendrogyra cylindrus (pillar coral), Dichocoenia stokesii (elliptical star coral), Meandrina meandrites (maze coral), and Colpophyllia natans (boulder brain coral). Florida Sea Grant reported that by winter 2022, nearly $30 million had been allocated by the Florida Legislature, NOAA, EPA, and other sources for disease response efforts.

SCTLD represents one layer of a longer-term decline. According to NOAA, as documented by NASA Earth Observatory, healthy coral cover on Florida's reef has fallen by an estimated 90 percent since the late 1970s, with algal turf increasingly replacing coral substrate across the reef system.

The summer of 2023 produced the most intense marine heat event on record for the Florida Reef Tract. A study confirmed by NOAA concluded that the heatwave triggered the functional extinction of two reef-building coral species in Florida waters: elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis). NOAA's Coral Reef Watch coordinator Derek Manzello stated that around the Florida Keys and Dry Tortugas, 98–100 percent of elkhorn and staghorn colonies died, as reported by NOAA's NESDIS. A NOAA Fisheries assessment found that by fall 2023, only 37 of at least 160 genetically distinct elkhorn coral colonies documented before the heatwave had survived — a loss of 77 percent of genotypic diversity, with surviving colonies restricted to 16 reefs in the upper Keys and Miami-Dade and Broward counties. A post-bleaching assessment from Florida's Reef Resilience Program found the Lower Keys subregion experienced a 29 percent decline in live tissue area, with 93 percent bleaching prevalence documented for Agaricia spp. and a 74 percent decline in colony numbers. A separate NOAA Fisheries assessment found that as of 2024, fewer than 22 percent of staghorn and less than 5 percent of elkhorn colonies survived the bleaching. In contrast, summer 2024 produced more favorable thermal conditions, according to NASA Earth Observatory.

In December 2024, NOAA released the final Restoration Blueprint for the Florida Keys National Marine Sanctuary — the first update to the sanctuary's management plan since 1997. NOAA's Office of National Marine Sanctuaries reports that the Blueprint expanded the sanctuary boundary by 20 percent, from 3,800 to 4,539 square miles, added 37 new marine zones, and designated 15 of those zones specifically to facilitate coral reef restoration. The Blueprint introduced two new restoration zone subtypes: nursery restoration areas and habitat restoration areas.

Multiple overlapping federal and state programs address reef restoration. The Florida DEP's Coral Protection and Restoration (CPR) Program, established in 2020, has administered more than $90 million since 2017, including a recurring $20 million Biscayne Bay Water Quality Improvement Grant. The CPR Program leads implementation of the Florida's Coral Reef Restoration and Recovery (FCR3) Initiative, which establishes a goal of developing the infrastructure and workforce capacity necessary to support the long-term recovery of no less than 25 percent of Florida's Coral Reef by 2050.

Within the Florida Keys National Marine Sanctuary, NOAA's Mission: Iconic Reefs program targets seven ecologically and culturally significant reef sites in the Florida Keys, aiming to restore nearly 3 million square feet of reef to self-sustaining levels by 2040 — a scale NOAA Fisheries has described as a first-of-its-kind approach to large-scale coral recovery. Following the 2023 bleaching losses, NOAA launched what it characterized as a next-generation restoration response, adapting coral sourcing and outplanting strategies to account for the severe loss of genetic diversity among elkhorn and staghorn populations. The FCR3 Initiative's 2050 goal and Mission: Iconic Reefs' 2040 target establish long-range public investment commitments that, according to the Florida DEP, will require sustained legislative appropriations and interagency coordination across multiple decades.

Florida's Coral Reef intersects with several other state-wide systems. As a primary nursery and feeding ground for spiny lobster, grouper, and snapper, the reef is a foundational substrate for Florida's commercial and recreational fisheries industries; NOAA documents Essential Fish Habitat designation for these species under federal fisheries law. The reef's coastal protection function connects directly to Florida's hurricane vulnerability and property insurance landscape: the USGS has documented that even a one-meter reduction in reef height would expand the 100-year floodplain by 20 square kilometers statewide and put an additional $2.9 billion in property and economic activity at risk.

The reef's health is inseparable from water quality dynamics in Florida Bay, the Everglades, and South Florida's stormwater management systems, as nutrient runoff and altered freshwater flow are documented stressors on coral communities. The 2023 bleaching event connects to broader Florida climate and sea surface temperature patterns. Biscayne National Park and Dry Tortugas National Park — both federal protected areas within the reef's geographic footprint — are major Florida ecotourism destinations, linking reef condition to the state's outdoor recreation economy. The NOAA Fisheries estimate that coral reef ecosystems provide $6.3 billion to the South Florida region underscores the reef's role as an ecological foundation for the broader coastal economy.