pen shell

Noun

Any of the Pinnidae, a family of large saltwater clams.

Japanese Meaning

Pinnidae科に属する大型の海水二枚貝

A large pen shell anchored itself among the seagrass, its fluted shell glittering in the shallow sunlit water.

大きなピンナ科の二枚貝が海草の間に根を下ろし、溝のある貝殻が浅く日差しの差す水面できらきらと光っていた。

Sense（1）

Any of the Pinnidae, a family of large saltwater clams.

pen shells

（ plural ）