First record of Sirembo imberbis (Ophidiidae) from Osaka Bay, Japan

A specimen of Sirembo imberbis (Temminck and Schlegel, 1846) was collected from Osaka Bay, Japan, in 2024. In Japanese waters, this species has previously been recorded from the Pacific coast from the Boso Peninsula to Shibushi Bay, the coasts of the Sea of Japan and East China Sea from Niigata to Kagoshima prefectures and Iyo-nada. Thus, the present specimen, described herein detail, represents the first record of S. imberbis from Osaka Bay.