Marilyn's Cut
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily — treat everything here as planning ranges.
Marilyn's Cut pairs classic Bloody Bay structure with the island's most personable residents. The cut itself is a sponge-lined stairwell from shelf to face, but the escort makes the dive: Little Cayman's famously bold Nassau groupers — beneficiaries of long protection and the celebrated spawning-aggregation research nearby — attach themselves to groups here like hired guides, holding station at a diver's shoulder for entire circuits. Photographers get portraits most reefs no longer allow. The wall beyond stays textbook vertical, and turtles surf the up-and-down commute between shelf and blue.
The moment you come for: Escort-service Nassau groupers, the sponge-lined cut, pristine vertical wall.
Topography: A cut slicing through the reef crown to the vertical face, walls dense with rope and vase sponges.
Entry: Bloody Bay mooring over a crevice splitting the wall lip.
Know before you splash
Hazards: Depth beyond the cut; otherwise benign in normal conditions.
Conservation: The tame groupers are a conservation success and a responsibility — no touching, no feeding, ever.
Nitrox: Worth it here — profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
Caribbean Reef Shark
Great Barracuda
Green Sea Turtle
Hawksbill Turtle
For photographers
Wide angle: ★★★★★ · Macro: ★★★☆☆ — editors' 1–5 rating of what this site gives each style of shooting