Bibb

The USCGC Bibb is one of the most iconic wreck dives in the Florida Keys — a 327-foot Treasury-class United States Coast Guard cutter with a distinguished service history that was deliberately sunk in 1987 as part of an artificial reef program within the Florida Keys National Marine Sanctuary. The Bibb saw action in World War II, participated in the historic rescue of survivors from the SS Dorchester (the troop ship sunk by a German submarine in 1943), and served the Coast Guard for decades before being donated to the reef. Today it rests on its port side at a maximum depth of approximately 130 feet near Molasses Reef, and in nearly four decades since its sinking the vessel has been transformed into one of the most spectacular marine environments in the Keys. The Bibb's resting position on its side gives it an unusual and slightly disorienting character — corridors and compartments that were once horizontal are now vertical, and the diver's perspective is constantly challenged by the tilted geometry of the hull. The wreck is heavily encrusted with orange elephant ear sponges, purple sea fans, and hard corals, and the water column above the structure is consistently packed with schooling fish: jacks, barracuda, and dense clouds of blue chromis fill the space above the hull with constant movement. Goliath grouper — the legendary giants of Florida Keys diving — have claimed the Bibb as prime territory, and encounters with these enormous fish are common and extraordinary. Moray eels, spotted eagle rays, and nurse sharks complete the ecological picture. The Bibb and the nearby Duane are typically dived as a pair on a two-tank excursion, and comparing the two sister ships — one upright, one on its side — is one of the signature experiences of Keys wreck diving. Advanced divers willing to push to the maximum recreational depth limits will find the Bibb among the most rewarding sites in American waters.