The Encyclopedia of Life states a maximum size of 2.4 in (61 mm),[3] though this number is known to vary among different sources.

S. plicaria contains both a gill and an operculum, as well as a long, pointed dextrally coiled turreted shell,[3] fading from brown to light grey.

Range of S. plicaria has not been described, though multiple sightings have been reported in the Southeast Asian[4] and South Pacific[3] regions.

S. plicaria is a gonochoric, broadcast spawner, beginning life as embryos, developing into planktonic trocophore larvae, later juvenile veligers, and finally adults.

[5] Embryos, larvae, and veligers are unable to survive under freshwater conditions.