originally identified as Brissus unicolor - a Mediterranean and Atlantic Ocean species - by the image contributor, but more likely is an Indo-Westpacific member of Brissus, possibly B. agassizii. "Brissus unicolor (Leske, 1778) 2016-07-04 by Dr. Wen-Jou Chen and Dr. Tseng Chueh-Fen, is a new recorded species from Taiwan, ROC. (Wangan Isle, Penghu County) Ref. Donovan et al., (2015), fig. 5B."
