Serratifusus harasewychi is a species of sea snail, a marine gastropod mollusc in the family Austrosiphonidae.

[2] This species is named to honor Jerry Harasewych from the National Museum of Natural History, Smithsonian Institution, for his contributions the knowledge of columbariform molluscs.

[2] The length of the shell attains 35.3 mm.

This marine species occurs off New Caledonia (depth range: 502–516 m).

This gastropod-related article is a stub.