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Provide your students with an in-depth study of the Hydra, including observations on its feeding, stinging cells, and reproduction. Green hydras, which demonstrate a symbiotic partnership with algae, are also covered. You can also study a two-stage hydrozoan life cycle in Obelia, then view the informative segment on scyphozoa, anthozoa, jellyfish, sea anemones, and coral. Duration: 16 minutes.
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