Naibaho, Jefrianto2013-01-072013-01-072013-01-07sumarnihttp://repository.unri.ac.id:80/handle/123456789/1149A study on the distribution of biofouling organism (Barnacle Spp) attached on body wall of boat of different material were conducted in sibolga harbour,North sumatera It showed that aboundance of barnacles in wooden,fiber,and metal were 637, 107 and 34 individu/m2, respectively. Statistically the aboundence were significantly different which related to physical properties (nough,smoth ) of the wall of boat.otherabundance/ speed of the currentArticle