Simbolon, Rafles Harisman2013-01-082013-01-082013-01-08sumarnihttp://repository.unri.ac.id:80/handle/123456789/1237This research was conducted on 30 June to 9 July 2012 in Sei Nagalawan village Perbaungan Serdang Bedagai Subdistrict North Sumatra Province. The purpose of this research was to investigate construction and design of traps fishing gear used by fisherman in Sei Nagalawan village. Information about this tool is needed for collection data and the development of fishing gear used and so we need complete data. The method used was survey method. The results showed trap fishing gear using the conch shell 300 pieces assembled as longline fishing to catch octopus cyanea. Rawai keong fishing gear consisting of main line, buoy , buoy line, flag , conch shells and anchors.otherConstruction of trapsSei Nagalawanthe main linebuoy linebuoysflagsconch shellanchorArticle