On the south side of this open-water area, a ledge drops to about 90 feet from the surface. Big jacks swim to within a few feet of the surface, although the larger fish tend to be somewhat timid. Sombrero Island . On the surface, this island resembles a hat underwater, so its profile makes the name Sombrero quite appropriate. Gorgonians, black coral shells, turtles, rays, grunts, jacks, snappers, and a great variety of soft corals are abundant.
Currents are normally strong during the full moon.
Diving is fairly shallow on the rim down to about 50 feet in certain area. The rim of the drop-off west of Sepok Point and running southwest is a very good dive site with a wide variety of marine lives. The drop-off is at about 50 feet. This open reef is for experienced divers only and its exploration may require help from local guides. The rock itself is surrounded by a fairly shallow area at about 35 feet, ending in a series of drop-offs running down to about 60 feet or more.