Live hydra 1

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A whole live green hydra (Phylum Cnidaria, class Hydrozoa, genus Hydra) seen under a light microscope with no staining or artificial coloring.  The hydra is still alive, and has extended its 7 tentacles (cnidae) which are lined with stinging cells (cnidocytes, visible as the bumps on the tentacles) that produce nematocysts.  Its mouth is visible at the base of the tentacles.  Hydra are active predators, hunting prey with their tentacles, and then killing them with toxins in their nematocysts.  Seen at approximately 40x magnification.
A whole live green hydra (Phylum Cnidaria, class Hydrozoa, genus Hydra) seen under a light microscope with no staining or artificial coloring. The hydra is still alive, and has extended its 7 tentacles (cnidae) which are lined with stinging cells (cnidocytes, visible as the bumps on the tentacles) that produce nematocysts. Its mouth is visible at the base of the tentacles. Hydra are active predators, hunting prey with their tentacles, and then killing them with toxins in their nematocysts....
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Keywords:
  • Cnidaria
  • Hydrozoa
  • Marc Perkins
  • OCC
  • animal
  • green
  • hydra
  • live
  • microscope
  • slide
  • tentacle
  • zoology