Cards (13)

    • Over 10 thousand species
    • Stinging cells
      Cnidocytes
    • Organelle that causes stinging
      Nematocyst
    • Cnidarians exhibit radial symmetry
    • Polyp is a benthic form of cnidarian with an opening surrounded by tentacles
    • The medusa is the free-floating form of a cnidarian
    • Most venomous animal in the world
      Carukia barnesi, common name Irukandji jellyfish
    • Portuguese man-of-war scientific name
      Physalia physalis
    • 3 Cnidarian Groups
      1. Hydrozoans (Colonial organisms)
      2. Scyphozoans (True jellyfish)
      3. Cubozoa (Box jellyfish)
      4. Anthozoans (Corals, anemones)
    • Hydrozoan polyps:
      1. Zooid - general term for polyp
      2. Gastrozooid - feeding polyp
      3. Gonozooid or Gonangium - reproductive polyp
    • Largest known jellyfish
      Lions Mane Jellyfish, scientific name Cyanea capillata
    • Also called the immortal jellyfish
      Turritopsis dohrnii
    • Turritotopsis dohrnii undergoes dedifferentiation to go back to less specialized cells or tissues
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