Spanning 247 acres, Molasses Reef is packed with shallow coral gardens, sandy channels and deeper reef habitats. With up to 32 mooring sites to explore, there’s a little something for every kind of underwater adventurer.
Molasses Reef is one of Key Largo’s most popular destinations for scuba diving and snorkeling, known for its impressive coral formations, abundant marine life and variety of individual dive sites. Located within the Florida Keys National Marine Sanctuary, Molasses Reef is a protected Sanctuary Preservation Area (SPA), where harvesting, removing or possessing marine life and other natural resources is prohibited.
The reef is characterized by a series of well-defined coral spurs separated by sandy channels and areas of rubble. Some of the coral formations rise to within approximately 10 feet of the surface, while the sandy grooves between them reach depths of roughly 30 to 45 feet. This varied terrain makes Molasses Reef an excellent choice for everything from shallow snorkeling and beginner dives to longer explorations for experienced divers.
Across the reef, divers and snorkelers can find dense strands of sea fans and other soft corals, along with barrel sponges, yellow tube sponges and a variety of hard corals: Elkhorn, staghorn, star, brain and fire corals can all be found throughout different areas of the reef, creating a diverse habitat for the marine life that calls Molasses home.
Depending on the site and conditions, you may encounter sea turtles, nurse sharks, southern stingrays, and large schools of tropical reef fish. Molasses Reef also holds pieces of Key Largo’s maritime history, including a historic Spanish anchor and remnants of shipwrecks scattered throughout portions of the reef.
With more than 30 mooring buoys spread across a reef system extending over half a mile, Molasses Reef truly offers something for everyone.
Sail Fish Scuba is proud to be a NOAA Blue Star Dive Operator in Key Largo, promoting responsible scuba diving and snorkeling, marine conservation, and guest education throughout the Florida Keys National Marine Sanctuary.
Winch Hole is a popular Molasses Reef dive site whose centerpiece is a large windlass—commonly called “the winch”—from an unidentified wooden sailing vessel that wrecked during the late 1800s. Divers can explore scattered rigging, iron fittings and other artifacts among sandy channels and coral formations. The site is also known for schools of parrotfish, snapper and chubs, with possible sightings of barracuda, tarpon and goliath grouper.
Site Depth: 25–30 feet
Diver level: Open Water
Aquarium is a great dive site for marine life lovers. Its shallow depth is ideal for newer divers, while clear visibility highlights the reef’s vibrant colors. Schools of tropical fish and diverse sea life create a natural aquarium experience, with the chance to spot larger species like Caribbean reef sharks.
Site Depth: 25-30 feet
Diver Level: Open Water
Just a short trip from Aquarium lies Spanish Anchor, one of those Key Largo dive sites we never get tired of exploring. It’s a shallow, easygoing dive with beautiful coral, great visibility, and plenty of marine life. The main attraction is the old 10-foot Spanish anchor, now covered in coral and completely part of the reef. Along the way, keep an eye out for turtles, nurse sharks, stingrays, moray eels, and schools of tropical fish.
Site Depth: 25-30 feet
Diver Level: Open Water
Eagle Ray Alley follows a broad sandy passage between North Star and Winch Hole. Its raised reef edges create sheltered spaces where divers may spot spiny lobsters (pictured), moray eels, spotted drums and glassy sweepers. Eagle rays, reef sharks and other large fish are common sightings.
Site Depth: 20–30 feet
Diver level: Open Water
Permit Ledge sits on the south end of Molasses Reef and is a favorite shallow dive with plenty of action. Sandy channels cut through the reef, with schools of grunts, snappers, parrotfish and barracuda. Along the way, there’s a fun swim-through often loaded with fish, and you might even find a Goliath grouper hanging out. Permit, tarpon and other big pelagic game fish are also common cruisers.
Site Depth: 20–30 feet
Diver Level: Open Water
Located near Permit Ledge on the southern end of Molasses Reef, Fire Coral Cave features a small swim-through surrounded by coral-covered reef formations. The site gets its name from the fire coral found throughout this section of the reef.
Schools of grunts and parrotfish are commonly seen around the reef, while moray eels and spiny lobster can be found hiding among the coral. Keep an eye out for larger visitors, including goliath grouper.
Site Depth: 20–30 feet
Diver Level: Open Water Diver
With a name like Molasses Reef, you have to wonder where it came from. The exact origin has never been confirmed, but local legend tells of a vessel carrying barrels of molasses that ran aground on the reef, leaving its cargo—and apparently its name—behind.
Whether the story is completely true or simply part of Florida Keys folklore, the name has been associated with this reef for well over a century. Today, Molasses Reef is known less for its mysterious name and more for its clear water, abundant fish and classic spur-and-groove reef formations.
Located offshore of Key Largo, Molasses Reef lies roughly five miles southeast of Rodriguez Key along the outer Florida Keys reef tract. Its position near a curve in the reef places Molasses farther towards the open waters of the Florida Straits.
The reef can only be reached by boat, with the ride from Key Largo generally taking about 40 minutes depending on the departure point and conditions that day.
Molasses Reef’s offshore location and proximity to the Gulf Stream often bring warm water and excellent visibility, making it a popular Key Largo dive destination year-round.
Conditions can vary across the reef, with some sites experiencing more current than others. On days with stronger current, portions of the outer reef can offer excellent opportunities for drift diving.
Whether you’re a newly certified diver or have years of experience underwater, Molasses Reef has something for everyone.
Molasses Reef is an excellent choice for newly certified divers because many of its dive sites are relatively shallow, creating an ideal setting to build experience and confidence underwater.
For underwater photographers, Molasses Reef is a dream. Schools of blue-striped grunts and mahogany snapper gather around the reef, while green sea turtles are always a welcome sight as they make their way over the coral. Southern stingrays can often be found resting along the sandy bottom, and the reef’s colorful corals, sponges and tropical fish provide plenty of subjects for both new and experienced underwater photographers.
Advanced divers can explore the deeper edge of Molasses Reef, where currents can create excellent conditions for drift diving.
With dozens of individual dive sites spread across Molasses Reef, there is always another part of this Key Largo reef system to explore.
Looking for a small, guided scuba diving experience in Key Largo? We keep our groups small, include an in-water guide, and are all about enjoying a great day of diving. If that’s your vibe, come explore Molasses Reef with Sail Fish Scuba.
Discover Key Largo scuba diving with Sail Fish Scuba, a small, family-run PADI 5-Star Dive Center offering daily guided trips to the Florida Keys’ coral reefs and historic wrecks. Whether you’re trying scuba for the first time, working toward your PADI certification, or an experienced diver looking to explore more of Key Largo, our focus is on small groups, personal attention, safety, and plenty of time in the water.
Since 2012, Sail Fish Scuba has welcomed divers from around the world to experience what makes diving in Key Largo so special. Our guests often describe our crew as patient, knowledgeable, professional, and welcoming, with many saying their dives feel more like diving with friends than being part of a crowded charter. Every recreational scuba trip includes a PADI dive professional in the water at no additional charge, along with complimentary underwater photos and videos so you can enjoy the dive while we capture the memories.
From shallow coral reefs filled with tropical marine life to some of Key Largo’s best-known wrecks, we’re here to help you experience the Florida Keys one dive at a time.
Daily Snorkeling and Scuba Diving Charters
Morning 2-Tank Dive Trip — Departs at 8:00 AM
Afternoon 2-Tank Dive Trip — Departs at 1:00 PM
Dive trips operate daily, year-round, with the opportunity to explore multiple sites along Molasses Reef.
