coastline, shoreline / a railroad that follows a coastline

(obsolete) Synonym of コートジボワール (Kōto Jibowāru, “Côte d'Ivoire”): Ivory Coast (a country in West Africa)

Kyūjitai form of 幼虫 (“larva”)

plumule

a Japanese cockle, an egg cockle: an edible marine bivalve mollusc of family Cardiidae, species Fulvia mutica

Kyūjitai form of 貝殻: shell; seashell

a Triton's trumpet (Charonia tritonis) shell used in ancient times as a horn to signal troop movements

kai-awase (a Heian period game involving matching two pieces of a clamshell) / (slang) tribadism

shell money; cowry currency

cone snail, cone shell (Conidae)