A new species of the roughy fish genus Hoplostethus , subgenus Leiogaster , is described based on three specimens collected from Sumatra, Indonesia. This species can be distinguished from its congeners by the following characteristics: gular region covered with ctenoid scales; pelvic‐fin spine smooth on its anterior edge; head depth subequal or smaller than its length (37.2%–38.6% standard length [SL], or 94.7%–99.2% head leng...

A new species of the roughy fish genus Hoplostethus is described from 11 types and a non‐type specimen collected from Taiwanese waters. It can be distinguished from its congeners by a combination of characters: pectoral‐fin rays 14–17 (modally 15–16); pyloric caeca 65–84; total gill rakers 19–20; predorsal scales 18–22; oral cavity, branchial chamber, top and underside of tongue, and peritoneum uniformly black; distal margin o...