Belomitra pacifica is a species of sea snail, a marine gastropod mollusc in the family Belomitridae.

The apical whorls show (on the third whorl about fifteen) very narrow, sharp, threadlike, vertical ribs with much wider interspaces, and at the suture numerous, irregular, small, retractive folds extending over the fasciole, with wider interspaces, nearly twice as many as there are ribs.

On the spire, the axial sculpture is crossed by (on the third whorl about eight, on the sixth ten or a dozen) fine flat threads with wider interspaces, (increasing by interpolation), which override the ribs and rise above them but do not form nodules at the intersections.

These spirals are very uniform and on the body whorl extend forward covering the siphonal canal, and are slightly scored by the incremental lines.

[2] This marine species occurs off the Alexander Archipelago, Prince Of Wales Island, West of, Alaska, United States, North Pacific Ocean at a depths of 2869 m.