The objective of the present study was to evaluate the length weight relationship of the marble goby (Oxyeleotris marmorata) in Ulim River, Pidie Jaya District, Aceh Province, Indonesia. The sampling was conducted at three sampling locations during February to May 2016. The Linear Allometric Model (LAM) and Relative weight condition factors were performed in this study. The study b value ranged between 2.70 to 2.74 indicate a negative allometric growth pattern. The relative weight condition factor was tended to 100. It means that the Ulim Rivers is still in good condition.Penelitian ini bertujuan untuk menganalisis hubungan panjang berat dan factor kondisi ikan betutu (Oxyeleotris marmorata) di Sungai Ulim Kabupaten Pidie Jaya. Penelitian ini menggunakan metode survey eksploratif pada tiga lokasi sampling selama Februari 2016 sampai Mei 2016 sebanyak 12 kali sampling. Model yang digunakan adalah Linear Allometric dan Faktor kondisi berat relative. Hasil penelitian menunjukkan bahwa rerata nilai  b berkisar 2,70 sampai 2.74 memunjukkan pola pertumbuhan allometric negative dan factor kondisi berat relatif mendekai 100, bermakna kondisi perairan masih dalam kondisi yang seimbang.
                        
                        
                        
                        
                            
                                Copyrights © 2016