Tennessee Reef is a coral reef located within the Florida Keys National Marine Sanctuary. It lies to the southeast of Long Key. It consists of drowned (deep) spur-and-groove reef. Much of the reef is within a designated "Research Only" zone.
| Tennessee Reef | |
|---|---|
 Tennessee Reef Light in 1966 | |
  Tennessee Reef (Caribbean) | |
| Location | |
| Location | Caribbean |
| Coordinates | 24°46′N 80°45′W / 24.767°N 80.750°W |
| Country | United States |
| Geology | |
| Type | reef |
An unmanned reef light is located near the reef.
