Trophon alaskanus Dall, 1902 Boreotrophon alborostratus Taki, 1938 Neptunea ithitoma Dall, 1919 Boreotrophon alaskanus[1][2] is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.

The shell is bone to creamy white in color with an elevated spire, a very distinct suture, and a strongly curved, long, slender siphonal canal.

The whorls are rounded and bear 8 to 10 narrow varices which are prominent at the shoulder, where they rise into long blunt spines that curve towards the axis of the shell.

The aperture is subovate, and the operculum is thin and light brown.

[2][3] This snail occurs in the Bering Sea north of Unalaska to northern Honshu, Japan.