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Phylum Cnidaria

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  1. Phylum Cnidaria Hydra, jellyfish, coral, & sea anemones

  2. Phylum Cnidaria Examples? • Sea anemones • Corals • Sea Pen • Sea Fan • Sea Plume • Hydra • Jelly fish • Portuguese Man o’ War • Box Jelly Fish

  3. I. Body Structure A. Polymorphism = more than one body form 1. Polyp 2. Medusa

  4. B. Polyp • Tube with tentacles around the mouth • Sessile Coral polyp

  5. Polyp (sea anemone)

  6. Polyp (Hydra)

  7. C. Medusa • Umbrella shape • Tentacles around mouth • Motile, Free-swimming

  8. D. Tentacles • Have nematocysts (stinging cells) • Coiled thread discharges like a harpoon • Contains neurotoxin • Paralyzes prey Discharged nematocyst

  9. Discharged nematocyst

  10. II. Level of Organization A. Tissue B. No organs

  11. III. Habitat A. Aquatic 1. Most Marine 2. Few fresh-water

  12. IV. Ecological Role • Predators and prey • Neurotoxins in medical research • Coral – jewelry, building, reefs (surfing!) • Coral reefs - habitat for many -great biodiversity - protect coastline E. Symbiosis with other organisms

  13. Class Anthozoa: Sea Anemones

  14. Sea Anemones (with sea urchins)

  15. Sea Anemones Clown fish with sea anemone

  16. Clown fish & eggs with sea anemone

  17. Clown fish with sea anemone

  18. Giant Sea Anemone

  19. Rosy Sea Anemone

  20. Class Anthozoa: Corals

  21. Brain Coral

  22. Coral

  23. Colt Coral

  24. Elkhorn Coral

  25. Cabbage Coral

  26. Flower Coral

  27. Feather Coral

  28. Gorgonian Fan Coral

  29. Lamellina Coral

  30. Sun Coral

  31. Subergorgia Coral

  32. Soft Coral

  33. Sea Pen

  34. Sea Fan

  35. Sea Plume

  36. Class Hydrozoa: Green Hydra

  37. Hydra

  38. Brown Hydra with buds

  39. Brown Hydra eating

  40. Hydra eating Daphnia • Hydra eats Daphnia

  41. Class Scyphozoa: True Jellyfish Fried egg jelly

  42. Jellyfish

  43. Jellyfish Red-eyed medusa

  44. Jellyfish

  45. Jellyfish

  46. Jellyfish Lion’s mane

  47. Jellyfish Purple lion’s mane

  48. Upside down Jelly fish

  49. Upside down Jelly fish

  50. Sea Nettle