Great hammerheads up to 4.5m, the most dramatic silhouette in the ocean, gliding over white sand in 10m of water. Usually one…Great hammerheads up to 4.5m, the most dramatic silhouette in the ocean, gliding over white sand in 10m of water. Usually one to four individuals at a time, close enough to fill a fisheye lens. Bull sharks and nurse sharks share the site. Bimini's Shark Lab, founded by Dr Samuel Gruber in 1990, has studied these animals for decades, many are named, sexed and tracked individuals. The winter aggregation was only opened to divers in the 2010s and remains one of the few reliable great hammerhead encounters on earth. Anchorage: Bimini Big Game Club / Resorts World marina; short run to the site. Hazards: No site-specific hazards noted, brief normally. Plus