The Elbow (or Elbow Reef) is a coral reef located within the Florida Keys National Marine Sanctuary. It lies to the east of Key Largo, within the Key Largo Existing Management Area, which is immediately to the east of John Pennekamp Coral Reef State Park.
This reef is within a Sanctuary Preservation Area (SPA). The Elbow is southwest Carysfort and east of Dry Rocks reefs.
Elbow Reef is a popular dive spot because of its beautiful reefs that have grown around some very old shipwrecks. The Gulf Stream passes closer to Elbow than many other Key Largo reefs which means in exchange for a bit of current, the water on Elbow is usually a very clear blue to the sandy bottom.
The area is sometimes called “wreck reef” because of the many ship remnants that have been found at this spot.
Elbow is marked by a 36-foot light tower. There are many coral fingers in this spur-and-groove formation. There are also ledges for exploration which shelter large amounts of marine life.
The deepest portion of the reef is the southern section which is marked by a buoy. Here the bottom slopes toward a ledge known as “Nelson’s Ledge”. At the ledge the bottom drops more steeply to sandy bottom. Giant barrel sponges, brain and star corals cover the bottom. via Divebuddy.com …