Pickles Reef is a large, shallow reef area where divers and snorkelers can view well-formed corals. The name comes from cement-filled pickle barrels sunk here during the Civil War.
These barrels are now covered with the largest pillar corals in the Keys. Numerous ledges and crevasses attract juvenile and tropical fish of many species. Look for purple sea fans, conchs, and the occasional lobster too.
Pickles Reef Key Largo Wiki
Pickles Reef is a small coral reef located within the Florida Keys National Marine Sanctuary.
It lies to the southeast of Key Largo, to the south the Key Largo Existing Management Area and John Pennekamp Coral Reef State Park.
Unlike many reefs within the Sanctuary, this reef is not within a Sanctuary Preservation Area (SPA).
The reef gets its name from the Pickle Barrel wreck.
Another small reef called Snapper Ledge is nearby. (Wikipedia)