Diversity of decapod crustaceans on intertidal zone of Sombu Beach, Wangi-Wangi Island, Wakatobi, Southeast Sulawesi

Marine decapod crustaceans are members of tropical benthic communities and play an important role in ecological function in the coastal area. Nowadays, human activity has increased in coastal area and may cause quality changes in aquatic ecosystems and substrates that will affect the species composition and diversity of crustaceans and another biota. Sombu Beach is one of the favorable sites for diving in Wangi-wangi Island, Wakatobi, Southeast Sulawesi. This study aimed to provide systematics list of decapod Crustaceans fauna in Sombu Beach. The study was conducted in the intertidal zone. Samples were collected with purposive random sampling method on Jan 4th, 2017. The result showed that 17 species from 10 families of Crustaceans that is Eriphidae, Majidae, Portunidae, Grapsidae, Gecarcinidae, Pilumnidae, Xanthidae, Diogenidae, Coenobitidae, and Plagusiidae. The most diverse family was Grapsidae with four species which are Grapsus albolineatus, Varuna litterata, Grapsus tenuicrustatus, and Percnon planissimum. Base on this result, the present study indicated that intertidal zone of Sombu Beach in Wangi-wangi Island is a relatively high diversity of decapod crustacean fauna. This study would be a preliminary study for further research and would be a base document of marine area.