Last Updated：2025/11/30
Sentence
淡水の生物多様性を研究している研究者たちは、その川でアメリカ固有の巻貝 Valvata utahensis（エラとオペルキュラムを持つ淡水種）の個体群が減少していることを発見して驚いた。
Quizzes for review
Researchers studying freshwater biodiversity were surprised to find a declining population of the Utah roundmouth snail in the river.
See correct answer
Researchers studying freshwater biodiversity were surprised to find a declining population of the Utah roundmouth snail in the river.
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Related words
Utah roundmouth snail
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