www.marineparks.go.tz · Official
Official marine-park rules and user-fee context.
Dive Spot Guide•
Hulls Rock
Drift-friendly outer reef slope on Mafia Island.
Boat-guided drift dive with a coral-rich upper slope; best for confident scuba divers who plan around current and sea state.
About Hulls Rock
Hulls Rock is a boat-accessed Mafia Island reef slope with a steep outer face that eases onto a shallower coral top. It is best handled as a guided drift dive, with the run shaped by current and sea state. Expect barrel sponges, healthy upper-reef coral, and regular sightings of turtles, rays, triggerfish, and mixed reef fish. It suits divers who are comfortable moving with the water.
•
Research Estimate At Hulls Rock
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 20m
AccessModerate entry effort
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesBasic facilities
CurrentStrong current
Where Is Hulls Rock?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Hulls Rock Planning Details
Depth range, seasonality, and planning context.
Reported Depth
8m - 40m
Depth Note
Steep outer slope with a shallower coral top and a deeper face; plan it as a drift-style reef dive.
Best Season
October to March, when seas are calmer and visibility is usually better.
Typical Conditions
Outer-reef drift conditions with a shallow coral top; calmer seas are more common in the October-to-March window, while the southeast monsoon can bring stronger winds and currents.
Safety & Access At Hulls Rock
Hazards, restrictions, and access requirements.
Key Hazards
Strong current
Safety Notes
Plan for a drift dive profile and be comfortable operating at depths to 40 m.
Legal Notes
Mafia Island sits inside a protected marine-park system, so park regulations and user fees are part of planning. Confirm current requirements with your operator before entry.
Local Intel For Hulls Rock
Community notes to help plan your visit.
Scuba Diving
The site is described as perfect for drift dives along a slope ranging from 40 m up to 8 m.
Freediving
Not a primary freedive target. The drift-style reef and current make it a better scuba choice than a solo breath-hold plan.
Snorkeling
Not a primary snorkel site. The shallow reef edge may show well on very calm days, but current and drift make it better suited to scuba.
Wildlife at Hulls Rock
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Hulls Rock
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Hulls Rock
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility20m
Activity
No dive activity logged yet.
