Marilyn's Cut

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.

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).