Boo Windows
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.
The signature of Boo Windows is architectural: two openings punched clean through the shallow ridge of the Boo islets, framing blue water and diver silhouettes for what may be Misool's most photographed moment. The swim-through is only the front door. Below, the ridge falls away in walls quilted with soft corals and sea fans in southern Raja's saturated palette, patrolled by sweetlips, snappers, and turtles, with pygmy seahorses on the fans for those who slow down. Fusilier schools stream along the edge and wobbegongs turn up under ledges. It works as a drift, a photo dive, and a gentle wall dive depending on the tide.
The moment you come for: The window swim-throughs; soft-coral walls; pygmy seahorses and turtles along the ridge.
Topography: Ridge off the Boo islets with two natural openings through the rock near the surface, walls and coral slopes below.
Current: Flow along the ridge is normal; the windows sit shallow where surge can add push.
Know before you splash
Hazards: Surge through the shallow windows; mind buoyancy against the rock edges and other divers queuing for the frame.
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
Hawksbill Turtle
Nudibranchs
Oriental Sweetlips
Pygmy Seahorse
Whitetip Reef Shark
For photographers
Wide angle: ★★★★★ · Macro: ★★★★☆ — editors' 1–5 rating of what this site gives each style of shooting