Fishes from the North-Eastern Sea of Japan and the Okhotsk Sea off Hokkaido, Edits

A psychrolutid,Malacocottus gibber, collected from the mesopelagic zone of the sea of Japan, with comments on its intraspecific variation

“…All specimens were divided into two types: Type I for specimens lacking an accessory spine on the preopercle, and Type II for specimens having an accessory spine on the preopercle. Measurements and counts follow those of Hubbs and Lagler (1958) and Amaoka et al (1983), except for the pectoral base width, which was measured between the uppermost and lowermost origins of the pectoral fin rays, and the caudal fin length, which was measured from the hidden base of the middle caudal ray to the tip of the fin. In this species the last Skull arches (Fig.…”