North Twin Island

Although this island has several diveable areas, the best site is Western Ridge. A shallow rock pinnacle lies about Sm below the surface several hundred meters west of the island's south tip. From there, a long rocky ridge slopes gradually to the west, eventually reaching 36m or more.
Diving is best on the north side of the ridge, where typical scenery consists of

large sea fans, small but colorful soft corals and a variety of hard corals, all attached to the rocky substrate. Though the south side appears rather barren compared with the north, fish life often includes schooling fish such as queenfish and rainbow runners, as well as reef species like jeweled and giant moray eels, blue-ringed angelfish, goatfish and many others. Around the deeper edges there is a chance of bigger animals, with occasional sightings of whitetip reef sharks, grey reef sharks and tawny nurse sharks. Even bull sharks have been seen here.