Order Gadiformes Family Macrouridae(Grenadiers or rattails). Formosa grenadier. Coelorinchus formosanus(Okamura, 1963) Max length: 25cm TL Korean name/tai-wan-kko-ri-min-tae(타이완꼬리민태) Japanese name/Taiwan-sokodara Chinese name/台湾腔吻鳕 D1/spine 2, soft ray 8~10. D2/soft ray; many(about 60). A/soft ray; many(about 60). Pectoral fin/spine 1, soft ray 15~18.
Distribution; Northwest Pacific/East China Sea, off southern Japan, Taiwan, and southern Korea. General; Snout moderately long(43 to 45% of head length), sharply pointed, anterolateral margin incompletely supported by bone. Orbit(23 to 26% of head length) less than snout length. Upper jaw(27 to 29% of head length) extends to below posterior margin of orbit, rictus extends to posterior 1/4 of orbits. Barbel 1.7 to 2.1 times into orbit. Premaxillary teeth in 7 or 8 irregularly oblique series forming a tapered band extending to near end of rictus, outer series enlarged. Mandibular teeth in 3 or 4 irregular series. Inner gill rakers on first arch 1 or 2 + 6 or 7. Head ridges well developed but not especially coarse. Underside of head mostly naked except on mandibular rami, and posteriorly from end of premaxilla to end of preopercle, and anterolateral margin of snout, where characteristic scales prevail. Nasal fossa and crescentic area above anterolateral edges of snout naked. First dorsal fin with 2 spines and 8 to 10 rays, its height less than postrostral length of head. Pectoral fin rays i15 to i18. Light organ long, extends as a black streak from anus to just behind isthmus, expanded at each end but lacking a scaleless fossa. Scales of body with short, sharp, triangular spinules arranged in irregularly quincunx pattern to subparallel rows. Scale rows below midbase of first dorsal fin above lateral line 3.5 to 4.5.
Greyish dorsally, silvery ventrally. Dorsally on trunk and tail with irregular blotches. Mouth lining whitish, gill cavity dusky. Paired black papillae on underside of head. Second spinous ray and membrane between spine and first segmented ray of first dorsal fin blackish. Pelvic and anal fin rays blackish distally. Benthopelagic in about 200 to 300 m depth. Occasionally taken by trawlers, but no catch statistics kept.
|