Nassarius alabasteroides is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks.
The length of the shell attains 24.7 mm
Nassarius alabasteroides is found in the South Pacific Ocean, on the guyot (or sunken atoll) Banc Capel, in the Coral Sea off the Chesterfield Islands of New Caledonia.