Hydra vulgaris
Hydra vulgaris, the fresh-water polyp, is a small freshwater hydroid with length from 10 mm to 30 mm and width about 1 mm.
Text from Wikipedia, CC BY-SA 4.0
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How we use cookiesHydra vulgaris, the fresh-water polyp, is a small freshwater hydroid with length from 10 mm to 30 mm and width about 1 mm.
Text from Wikipedia, CC BY-SA 4.0
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