The blackfin waryfish (Scopelosaurus lepidus) is a species of fish in the family Notosudidae (waryfish).
The blackfin waryfish is pinkish black in colour, with the pectoral fins having a large black patch covering their basal two-thirds and a white distal stripe. It has a maximum length of and 59 or 60 vertebrae.
The blackfin waryfish lives in the North Atlantic Ocean. It is benthopelagic and oceanodromous, living at depths of .
The young feeds on copepods while the adults feed on euphausiids, hyperiids and mesopelagic fish. Spawning occurs in midwater far offshore, including in the Sargasso Sea. It is eaten by Sebastes (ocean perch).