Yen-Ting LinChien-Hsiang LinYU-SAN HAN2025-03-172025-03-172025-01-25https://www.scopus.com/record/display.uri?eid=2-s2.0-85216561822&origin=recordpagehttps://scholars.lib.ntu.edu.tw/handle/123456789/725726Article number e3In this study, a single specimen of Pacific black scabbardfish Aphanopus arigato Parin, 1994 was collected at a depth of ∼500 m near Dongsha Island in southwestern Taiwan (18°49′ to 20°45′N and 112°46′ to 116°15′E), on 14 March 2023. This is the southernmost record of A. arigato, with a significantly wide range extension from northern Japan, and southern Kuril Islands to the South China Sea. We also provide comparisons of the morphological measurements, first description of sagittae otoliths, and a partial sequence of the cytochrome oxidase subunit I gene for the specimen studied in this study. Copyrightendeep-sea fishDongsha Islandnew recordotolithrange expansionjournal article10.1017/S002531542400119X