Selar tetengkek merupakan salah satu jenis ikan hasil tangkapan para nelayan di pulau bunyu. alat tangkap yang digunakan nelayan yaitu pancing ulur/tangan (head line). ikan selar tetengkek termasuk ikan pelagis kecil yang tergolong ke dalam ikan karnivora dan menjadi salah satu sumberdaya perikanan yang memilikinilai ekologis dan ekonomis. tujuan penelitian yaitu menjelaskan komposisi ukuran panjang total, panjang standar dan berat dengan pendekatan distribusi ferkuensi ukuran dan menjelaskan secara deskriptif kuantitatif hubungan panjang berat dengan pendekatan regresi pola kubik. penelitian dilakukan di perairan pulau bunyu selama 3 bulan terhitung dari persiapan hingga telaksananya penelitian pada bulan mei sampai dengan bulan juli 2022. metode pengambilan sampel yang digunakan yaitu purposive sampling. pengumpulan data dilakukan dengan cara mengambil ikan dari nelayan pancing ulur di perairan pulau bunyu. komposisi ukuran panjang total terbentuk 9 kelas dengan kisaran ukuran 25,0-55,7cm pada ukuran panjang standar 21,0-48,7cm dan berat 100,0- 1355,9 gram.hubungan panjang total dan berat memiliki nilai b=2,876 yaitu allometrik negatif, pada hubungan panjang standar memiliki nilai b=2,853 yang bermakna allometrik negatif dan hubungan panjang cagak memiliki nilai b=2,917 yaitu allometrik negatif, yang memiliki makna bahwa pertambahan berat lebih lambat dibandingkan pertambahan panjangnya. kata kunci : allometrik negatif; hubungan panjang berat, komposisi ukuran,pancing ulur, selar tetengkek

Selar tetengkek fish is one type of fish caught by fishermen on bunyu island. the fishing gear used by fishermen was the hand line (headline). selar tetengkek fish is a small pelagic fish classified as a carnivorous fish and is one of the fishery resources with ecological and economic value. the primary purposes of this research were to describe the size composition of total length, standard length, and weight with a size-frequency distribution approach and to explain the quantitative length-weight relationship descriptively with a cubic pattern regression approach. the research was conducted in the sea of bunyu island for three months, from preparation to implementation in may to july 2022the sampling method used was purposive sampling. data was collected by taking fish from longline fishermen in the sea of bunyu islandthe composition of total length size formed nine classes with a size range of 25.0-55.7 cm at a standard length of 21.0-48.7 cm and a weight of 100.0-1355.9 grams. the relationship between total length and weight has a value of b = 2.876 which was negative allometric; the relationship of standard length had a value of b = 2.853, which means negative allometric, and the relationship of length had a value of b = 2.917 which was negatively allometric, which means that weight gain was slower than length gain. keywords: negative allometric, length weight relationship, size composition, longline, selar tetengkek fish