This eulimid bores into the arms of sea stars, usually Linckia multifora at Kwajalein, leaving only the tip of its spire exposed and forming a thickened gall in the sea star arm.
The photo immediately below was taken in Hawaii.
Below are a couple of the snails after they had been extracted from the sea star arm.
More stars showing the galls of Stilifer invasion.
Created 2 July 2017