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Have stinging cells ( a must to be a cnidarian ) to capture prey Have radial symmetry

Phylum Cnidaria. Have stinging cells ( a must to be a cnidarian ) to capture prey Have radial symmetry Central point Soft Corals, Hard Corals, Sea Fans, Hydra, Jellyfish, Sea Anemones. CORALS. Create coral reefs at growths of ½ inch per year

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Have stinging cells ( a must to be a cnidarian ) to capture prey Have radial symmetry

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  1. Phylum Cnidaria • Have stinging cells (a must to be a cnidarian) to capture prey • Have radial symmetry • Central point • Soft Corals, Hard Corals, Sea Fans, Hydra, Jellyfish, Sea Anemones

  2. CORALS • Create coral reefs at growths of ½ inch per year • Deposit skeleton of calcium carbonate (limestone) • Photosynthetic and symbiotic dinoflagellates (zooxanthellae) live within coral structure and provide energy to growing coral.

  3. Zooxanthellae

  4. Coral Growth is Very Slow 1/2 inch per year Point of Growth

  5. Coral polyps close during the day, but open at night for feeding

  6. Open Polyps of Flower Coral Ready for Feedig

  7. Corals begin in Free-floating Medusa Stage

  8. Nematocysts Stinging Cells Polyp Design Body form of attached cnidarians Gastrovascular Cavity for feeding Point of Attachment to Reef

  9. Nematocysts Coiled dart that remain loaded and fire when touched

  10. Toxic Threat.... • Toxins in nematocysts are quite potent • Of the 9,000 to 10,000 cnidarians, only a handful pose a threat to humans • In most cases, nematocysts are not strong enough to penetrate skin

  11. Formation of an Atoll Reef System

  12. Hydra

  13. Purple Tipped Anemone

  14. Types of Corals Found on the Coral Reef...

  15. Hard Corals

  16. Brain Coral Polyps

  17. Antler Coral

  18. Antler Coral Close - up

  19. Flower Coral

  20. Plate Coral

  21. Staghorn Coral

  22. Elkhorn Coral

  23. Pillar Corals

  24. Table Corals

  25. Foliase Corals "Whorls"

  26. MASSIVE CORALS

  27. Branching / Finger Corals

  28. Elkhorn Coral Club-tipped Finger Coral

  29. Organ Pipe Coral

  30. Fire Coral

  31. Rash Caused by Fire Coral

  32. Encrusting Coral

  33. Soft Corals

  34. Bubble Coral

  35. Sea Fans

  36. Sea Whips

  37. Carnation Coral

  38. Polyps Extended

  39. Reproduction Egg Release

  40. Sperm Release

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