A cnidaria

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A cnidaria

  1. 1. Phylum CnidariaHydra, jellyfish, coral, & sea anemones
  2. 2. Phylum CnidariaExamples?• Sea anemones• Corals• Sea Pen• Sea Fan• Sea Plume• Hydra• Jelly fish• Portuguese Man o’ War• Box Jelly Fish
  3. 3. I. Body StructureA. Polymorphism = more than one body form1. Polyp2. Medusa
  4. 4. 1. Polyp• Tube with tentacles around the mouth• Sessile Coral polyp
  5. 5. Polyp (sea anemone)
  6. 6. Polyp (Hydra)
  7. 7. 2. Medusa• Umbrella shape• Tentacles around mouth• Motile, Free-swimming
  8. 8. • Have D. Tentacles nematocysts (stinging cells)• Coiled thread discharges like a harpoon• Contains neurotoxin• Paralyzes Discharged prey nematocyst
  9. 9. Discharged nematocyst
  10. 10. II. Level of OrganizationA. TissueB. No organs
  11. 11. III. SymmetryRadial Compass jellyfish
  12. 12. IV. HabitatA. Aquatic 1. Most Marine 2. Few fresh-water
  13. 13. V. FeedingA. Carnivores Lion’s mane eats (predators) another jellyB. Process of feeding 1. Tentacles sting prey with nematocysts 2. Tentacles grab prey 3. Prey pulled into mouth
  14. 14. Process of feeding4. Prey stuffed into gastro-vascular cavity (GVC)*5. GVC makes enzymes, extra- cellular digestion6. Undigested food back out mouth *incomplete digestive tract (no anus)
  15. 15. Lion’s mane jellyfish eating
  16. 16. VI. Respiration• Via diffusion
  17. 17. VII. Internal TransportVia diffusion
  18. 18. VIII. Excretion• Via diffusion
  19. 19. IX. ResponseA. No cephalization or nervous systemB. Nerve net around mouth
  20. 20. IX. ResponseC. Sensory cells 1. Chemoreceptors (chemicals) 2. Thigmoreceptors (touch) 3. Photoreceptors (light) Ocelli (eyespots) 4. Statocysts (balance)
  21. 21. X. LocomotionA. Medusa motile, free-swimmingB. Polyps sessile Exceptions: 1. Hydra tumbles on tentacles 2. Sea anemones glide on pedal disc
  22. 22. XI. Reproduction1. Asexual budding from polyps or medusae2. Sexual a. Medusae release sperm & eggs b. Larvae free-swimming
  23. 23. XII. Ecological RoleA. Predators and preyB. Neurotoxins in medical researchC. Coral – jewelry, building, reefs (surfing!)D. Coral reefs - habitat for many -great biodiversity - protect coastlineE. Symbiosis with other organisms
  24. 24. Class Anthozoa: Sea Anemones
  25. 25. Sea Anemones (with sea urchins)
  26. 26. Sea Anemones Clown fish with sea anemone
  27. 27. Clown fish & eggs with sea anemone
  28. 28. Clown fish with sea anemone
  29. 29. Giant Sea Anemone
  30. 30. Rosy Sea Anemone
  31. 31. Class Anthozoa: Corals
  32. 32. Brain Coral
  33. 33. Coral
  34. 34. Colt Coral
  35. 35. Elkhorn Coral
  36. 36. Cabbage Coral
  37. 37. Flower Coral
  38. 38. Feather Coral
  39. 39. Gorgonian Fan Coral
  40. 40. Lamellina Coral
  41. 41. Sun Coral
  42. 42. Subergorgia Coral
  43. 43. Soft Coral
  44. 44. Sea Pen
  45. 45. Sea Fan
  46. 46. Sea Plume
  47. 47. Class Hydrozoa: Green Hydra
  48. 48. Hydra
  49. 49. Brown Hydra with buds
  50. 50. Brown Hydra eating
  51. 51. Hydra eating Daphnia• Hydra eats Daphnia
  52. 52. Class Scyphozoa: True JellyfishFried egg jelly
  53. 53. Jellyfish
  54. 54. JellyfishRed-eyed medusa
  55. 55. Jellyfish
  56. 56. Jellyfish
  57. 57. Jellyfish Lion’s mane
  58. 58. JellyfishPurple lion’s mane
  59. 59. Upside down Jelly fish
  60. 60. Upside down Jelly fish
  61. 61. Sea Nettle
  62. 62. Jelly and diver
  63. 63. Giant Jelly off Coast of Japan
  64. 64. Beached Jelly fish
  65. 65. Portuguese Man 0’ War (aHydrozoan), NOT a true jelly fish
  66. 66. Portuguese Man 0’ WarTentacles of Physalia physalis
  67. 67. Portuguese Man o’ War vs. Box Jelly fish
  68. 68. Class Cubozoa: Box Jellyfish
  69. 69. the Box jelly fish

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