evidence: Administratively, Brunei Bay comes under two countries (Malaysia and Brunei). The Malaysian parts of its shoreline are also divided between two States: Sarawak and Sabah. The situation is further complicated by the fact that Brunei constitutes two separate territories (Brunei and Temburong districts) which are separated, along this bay, by Sarawak (Limbang district). The eastern curve of the bay is formed by the estuaries of the Klias, Padas and Menumbok rivers, flowing out of the Klias peninsula in Beaufort district, Sabah (MYSB09).There are three separate areas within this bay which are significance for birds: Limbang estuary, Trusan-Sundar and Menumbok estuary. These are treated separately below.(I) Physical Characteristics [...] Nasalis larvatus). Protection of the Limbang mangroves was also echoed by Bennett and Gombek (1986) based on the following reasons;Limbang is Sarawak's only major contribution to Brunei Bay fishery.Limbang links two protected sections of Brunei's mangroves. Destruction of Limbang will result in faunal degradation and reduced protection of Brunei areas.Brunei Bay's Proboscis Monkey (