Black Rock is a combination dive of one huge cave and several lava rock formations just off Lahilahi Point.
| Name Dive Site: | Black Rock or Ulua Cave |
| Depth: | 29-88ft (9-27m) |
| Inserted/Added by: | hawaiiscubadiving |
| Rated: | Rated 5.0, 1 votes |
| Specifications: |     |
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Black Rock is a wall dive 40-90 feet deep with a large cavernous room named Ulua Cave approximately 100 feet long and 50 feet wide. The mooring buoy at this site takes the diver down to 55ft and the top of the rock extension. One side of the room is completely eroded allowing easy multiple entry and exit points. The free drop over the adjacent wall to 90' takes you to a huge underwater cavern open on three sides. Very often white-tip reef sharks and/or turtles will be resting under this large overhang. Beautiful hard coral polyps live on the ceiling as well as the occasionally spiny lobster or Kona crab. Be careful not to kick up sand in the cave so the visibility stays good.
Traveling towards shore from the cave to the dive proceeds along the bottom of the wall until the turnaround air limits are reached, at which point divers return along the other side of the "Black Rock". The dive site is located at the west of Oahu near Lahilahi Point.
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