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Hydra has a tubular body up to 10 mm long when extended secured by a simple adhesive foot. At the free end of the body is a mouth opening surrounded by one to twelve thin, mobile tentacles
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Madrid, Madrid, Spain
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Madrid, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Madrid, Madrid, Spain
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Rumoroso, Cantabria, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Madrid, Comunidad de Madrid, Espaa
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Madrid, Comunidad de Madrid, Espaa
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Lumbreras, La Rioja, Spain
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Madrid, Madrid, Spain