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Unformatted text preview: in between-2 body forms are common: polyp vs medusa-Have cnidocytes (stinging cells) with nematocysts located on tentacles-Three classes o 1. Hydrozoa = Hydra, Obelia, Physalia, Gonionemus o 2. Scyphozoa = Aurelia o 3. Anthozoa = Metridium , corals...
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- Spring '08