The halophytic ''sabkha'' type desert vegetation is predominant in Muscat. The Qurum Nature Reserve contains plants such as the ''Arthrocnemum Macrostachyum'' and ''Halopeplis Perfoliata''. Coral reefs are common in Muscat. ''Acropora'' reefs exist in the sheltered bays of the satellite towns of Jussah and Khairan. Additionally, smaller ''Porites'' reef colonies exist in Khairan, which have fused to form a flat-top pavement that is visible at low tide. Crabs and spiny crayfish are found in the waters of the Muscat area, as are sardines and bonito. Glassfish are common in freshwater estuaries, such as the Qurum Nature Reserve.