Last Updated
：2025/12/04
freshwater hydra
Noun
Japanese Meaning
淡水に生息するヒドラ。体長約10mmほどの単独のポリプで、池や小川の水草の裏側に付着し、口を囲む触手を有する、中空の円筒状の体構造を持つ生物。
（ plural ）
Quizzes for review
a solitary polyp about 10 mm long, usually found attached to the under surfaces of water plants in ponds and streams. Similar to a sea anemone consisting of a hollow cylinder with a mouth surrounded by tentacles.
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freshwater hydra
While observing the pond, I noticed a freshwater hydra clinging to the underside of a water plant.
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While observing the pond, I noticed a freshwater hydra clinging to the underside of a water plant.
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