Japanese false cerith; Batillaria cumingii
A small marine snail found in Japanese waters; the name is a taxonomic designation.
I observed Japanese false ceriths on the tidal flat.
Kanji spelling is rare and mainly found in taxonomic contexts.
The Japanese name ホソウミニナ literally means 'thin sea snail'. The derivation is straightforward from the components 細 (thin), 海 (sea), and 蜷 (snail).