www.mdaguam.com · Dive Operator
Local destination page with depth, boat access, and marine-life details.
Big Blue
Big Blue is a boat reef with bright corals and strong visibility.
Scuba DivingBoatIntermediate
ReefWall
Boat-access sloping reef on Guam’s north side with a shallow start, colorful hard corals, and a profile that works for beginners and advanced divers.
About Big Blue
Big Blue is a boat-access reef off Guam’s north side with a curved slope that starts near the surface and rolls into deeper water. It is an easy-to-read site with bright hard corals, strong visibility, and enough depth and marine life to suit beginners while still rewarding more experienced divers. It is also a classic Guam reef for divers who want an easy outline in the shallows and a longer look at the deeper slope.
Safety & Access
Safety Notes
The reef drops quickly beyond the shallow section, so keep an eye on depth and turn points.
Access Restrictions
Boat access only.
Legal Notes
Follow local boating and reef-protection rules.
Where Is Big Blue?
Featured Operators
Loading local operators…
Local Intel For Big Blue
Community notes to help plan your visit.
Scuba Diving
A sloping reef that starts shallow enough for newer divers while still offering deeper interest for advanced profiles.
Freediving
The shallow reef edge may suit experienced freedivers, but the site is primarily a scuba boat dive.
Snorkeling
The shallow reef edge may be visible from the surface, but the main attraction is the scuba reef profile.
Wildlife at Big Blue
Species commonly reported at this site, with direct links into their wildlife guides.
Research Estimate At Big Blue
Access · 4/5Simple entry
Research estimate
Coral · 5/5Pristine, vibrant coral
Research estimate
Aquatic Life · 5/5Exceptional variety
Research estimate
Facilities · 4/5Good facilities
Research estimate
- VisibilityResearch estimate
- 30m
