Order Gadiformes Family Macrouridae(Grenadiers or rattails). Sharpnose grenadier Coelorinchus longissimus(Matsubara, 1943). Max length: 36.0 cm SL Korean name/mu-jul-bi-neul-chi(무줄비늘치) Japanese name/Tongari-hige Chinese name/長管腔吻鱈(장관강문설) D1/spine 2 soft ray 8~10. P1/16~20. P2/7. GR/1~2+5~7. D2/soft ray; many. A/soft ray; many.
Distribution; Northwest pacific/Southeastern sea of Korea, southern Japan, East China Sea. General; The shape of the body is similar to Japanese grenadier(Coelorinchus japonicas). Head large, about as wide as deep, usually longer than one-fourth total length of body. Snout is long and very sharply pointed. Mouth small, wholly inferior. The barbel on the lower jaw very short. Both jaws with bands of rough teeth. Teeth conical. The front of the snout has no scales. Orbit oval, moderate in size. Infra orbotal ridge straight and the scales on the ridge are arranged in a line. Sensory canals on head well spacious. Scales nearly hexangular, thin and rather deciduous. The spines on scale are arranged in 11 rows radially outward. A large naked area present anterolateral margin of snout. Nasal fossa largely naked. No brown bumps(papillae) underside of the head(area before the mouth). The belly side of the head and lower jaw without scales except the front tip of snout. The number of scales from above the lateral line to the center of the 1st dorsal fin is 3.0-4.5. Unlike Spearnose grenadier(Coelorinchus multispinulosus), the caudal fin is clearly shaped. Second dorsal fin less developed and lower than anal fin. No pectoral fin rays elongated into filament. The body has a dark brown color, dark markings on body indistinct. Very long conduit of luminous organ on abdomen, located from right in front of the anus to the base of pelvic fin, looks thin and black through the skin, the anterior photophore fossa-like, but scaled. It lives on muddy bottoms of the continental slope with a depth of 250-400m, and the spawning period is from March to April.
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