E-6 is a seamount rising sheer-sided from 3,000ft right in the center of the narrowest part of Bligh Water, where it intercepts the flow of nutrients funneled between the two large islands of Viti Levu and Vanua Levu. Pelagics are normally found on the two sides of the pinnacle flushed by currents, while delicate soft corals and fans decorate the protected lee side where NAI'A moors. The Cathedral is a large swim-though lined in gorgonia fans and soft coral, with soft-coral trees growing up from the floor. A narrow opening above allows sun rays to penetrate to the floor of the Cathedral, illuminating the bright fans and soft coral like so many panes of stained glass, giving it the feel of its namesake. The floor is home to several different colors of poison-bristle nudibranch, while adjoining small caves shelter many large lobsters. It is not unusual on night dives to encounter 20 big lobsters out patrolling their territory. Other highlights of night dives at E-6 are giant cuttlefish, arrowhead crabs, tiny soft coral cowries, colonial anemones on the gorgonia fans, and so many flashlight fish that tourists can navigate by their bright green light. Day dives at E-6 feature schooling barracuda, trevally, and surgeonfish, occasional hammerhead sharks and eagle rays, and a plethora of reef fish including anthias, fusiliers, and leaf scorpion fish.