barnacle

noun

European goose smaller than the brant
コクガンより小さいヨーロッパのガン

breeds in the far north
ずっと北で繁殖する
marine crustaceans with feathery food-catching appendages
餌を引き寄せる羽のような付属肢を持つ海水甲殻類

free-swimming as larvae
幼生時は自由に泳ぐ

as adults form a hard shell and live attached to submerged surfaces
成体になると硬い殻を作り、水没した表面に固着して生息する

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