Community knowledge of the status, threats and conservation issues affecting the dugong Dugong dugon was investigated in the Sulu Sea, Malaysia. Interviews with local fishermen were conducted in 12 villages from the tip of Tanjung Inaruntung to Jambongan Island, in northern Sabah, Malaysia. According to the respondents dugong numbers are low and sightings are rare. Dugongs have been sighted around Jambongan, Tigabu, Mandidarah and Malawali Islands. The apparent decline of the dugong in this area is possibly because of incidental entanglement in nets, and opportunistic hunting. Seagrasses are present and have economic importance to the community. The fishermen have difficulty in understanding issues of conservation in relation to dugongs. I recommend that conservation initiatives begin with dialogue and an education programme, followed by incentives for development of alternative livelihoods. Using community knowledge for conservation purposes may be the only option in data-deficient regions, especially where financial constraints are high and the need for management intervention for threatened species is urgent.