The Don Hoi Lord site 80 km to the west of Bangkok in Thailand is a site of recognized ecological interest (Ramsar site for the conservation and sustainable use of wetlands). This sandbar, enriched by the accumulation of nutrient sediments carried by the Mae Klong river, is also a craft fishing ground for a species of razor clam (Solen regularis), a delicacy much appreciated by the Thai people. For several years activity in the fishery (which has operated for over 80 years with no form of regulation) has been intensifying and the resource seemed threatened. In 2003, research work started by implementing a companion modelling approach with the goal of stimulating exchanges between the various stakeholders (i.e. mainly fishermen and local authorities) and exploring collectively various management options for the fishery.