SCOMBRIDAE Grammatorcynus bilineatus, 158 mm SL Grammatorcynus bilineatus (Rüppell, 1836) Doublelined mackerel Tongkol dua gurat sisi D XI-XIII-10-14; A 10-14; P1 22-25; GR 17-22 Body covered with small scales; 2 lateral lines on side; a single small flap between pelvic fins; dorsal side of body metallic bluish green; reaching to 100 cm fork length. Indo-West Pacific. Badan tertutup oleh sisik-sisik kecil; dua gurat sisi di sisi badan; satu selaput kulit diantara sirip perut; badan bagian punggung hijau kebiruan metalik; mencapai ukuran 100 cm panjang cagak. Indo-Pasifik Barat.