noun
trigoniid clam
Refers to any clam of the family Trigoniidae. A technical zoological term; in everyday contexts, the kana spelling is preferred.
さんかくがいは、主にオーストラリア近海に生息する二枚貝です。
Trigoniid clams are bivalves that mainly inhabit the waters around Australia.
Compound of 三角 (さんかく, 'triangle') + 貝 (かい, 'shellfish'), referring to the triangular shape of the shell.