Kermia thespesia is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

The shell is pure delicate white, with seven or eight whorls, of which three are apical and vitreous brown.

Where the spiral lines cross the oblique riblets a gemmuliferous appearance is presented.

Some specimens are almost plain, others have a row of square brown spots just below the suture on the body whorl.

[2] This marine species occurs off the Loyalty Islands and off Mauritius, Taiwan, New Caledonia and in the Coral Sea.