Coral reef islands and atolls. The reef face is the zone above the reef floor or the reef drop-off. This zone is often the reef's most diverse area. Coral and calcareous algae provide complex habitats and areas that offer protection, such as cracks and crevices. Invertebrates and epiphytic algae provide much of the food for other organisms. A common feature on this forereef zone is spur and groove formations that serve to transport sediment downslope. The reef flat is the sandy-bottomed flat, which can be behind the main reef, containing chunks of coral. This zone may border a lagoon and serve as
Miri-Sibuti Coral Reef National Park diving locations and the largest offshore national park created in the state of Sarawak. The reefs house a wide diversity of marine creatures including soft corals like leather corals, sea whips, Bubble corals, staghorn corals, Dendronephthya and Gorgonia sea fans, as well as sponges including elephant ear spongees. Fish species include clown fish, yellow and blueback fusiliers, angelfish, butterfly fish, sea perch, lizardfish, batfish, jackfish, barracudas, Napoleon wrasse and sharks. Other creatures include feather stars, giant clams, nudibranches, anemones and sea horses. Miri-Sibuti Coral Reef National Park The Miri-Sibuti Coral Reefs National Park is a protected area of coral reefs