freshwater hydra

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

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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While observing the pond, I noticed a freshwater hydra clinging to the underside of a water plant.

詳細

意味（1）

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.

freshwater hydras （ 複数形 ）