ZOOLOGY Bill Palmer CNIDARIA “The Stingers”

CNIDARIA Includes: Stinging Jellyfish Hydra (freshwater) Anemone Coral

CNIDARIA Most are marine Some are fresh water

CNIDARIA This phylum is named for the stinging cells found on all members called cnidocytes The phylum is also called the Coelenterates which means “hollow gut” They also have tentacles

CNIDARIA Medusa-has a bell-shaped body Polyp-has a vase-shaped body MEDUSA POLYP

CNIDARIA

Feeding Capture prey and paralyze it with coiled stinging cells called nematocysts

CNIDARIA Feeding Inside is hollow and is called the Gastrovascular Cavity or Coelenteron Prey is digested in cavity and waste is expelled through mouth

CNIDARIA Three Classes (about 15,000 species) Hydrozoa-3700 species Scyphozoa-5,000 species Anthozoa-6,100 species

CNIDARIA Class Hydrozoa 3,700 species Most in Ocean Hydra lives in fresh water Hydra is white or brown or dark green

CNIDARIA Class Hydrozoa Hydra feeds by capturing prey as it floats by Prey gets tangled in tentacles Tentacles push pray towards mouth Reproduce by budding (asexually) in warm times Reproduce by sperm and egg (sexually) in cool temps

CNIDARIA Hydra

CNIDARIA Class Hydrozoa Some hydras are solitary; some are colonial Other members include: Obelia Physalia (Portuguese-Man-O-War) –May be 3 ft in diameter and tentacles to 80 feet –Sting Humans on beach-even when washed on shore

CNIDARIA Portuguese Man of War

CNIDARIA Class Scyphozoa About 5,000 species Cup animals-most jellyfish May be from ½ inch to 12 feet in diameter May kill people-Sea Wasp kills more people than sharks!

CNIDARIA Sea Wasps (Box Jellyfish) Irukandji

CNIDARIA Stings from jelly fish :// guX9WI

CNIDARIA Stings from jelly fish

What is best treatment for Jellyfish sting???? Stay Safe. As always, safety is the most important step. Jellyfish tentacles (nematocysts) may still be on the skin. If the species is known to be box jellyfish (Chironex fleckeri) or Irukandji (Carukia barnesi), get emergency medical help immediately. For box jellyfish stings, vinegar may help (see tips). Rinse the tentacles off. Rinse away the tentacles using hot water if possible (see step 5 for how hot). If heated water isn't available, use salt water rather than fresh. Fresh water may worsen the stinging pain. Peel off the tentacles. Remove any remaining tentacles with a gloved hand, stick, shell or tweezers. Be careful not to get the tentacles on yourself or on clothing.

CNIDARIA Class Anthozoa 6,100 species Sea anemones and corals Sea anemones may have symbiotic relationship with clown fish Fish lives in tentacles and is immune to sting Fish eats scraps of food and is protected from predators Anemone is kept clean of debris

CNIDARIA Sea Anemone

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CNIDARIA Sea Anemone with Clownfish :// m/watch?v=hyYW 0mr-e7k

CNIDARIA Class Anthozoa Corals a small cnidarians that build reefs Fringing reef-close to beach Barrier reefs farther from beach-Great Barrier Reef in Australia Atolls-Reefs with open lagoon in middle, may be top of a volcano-Bikini Atoll-for the swim suit (she wore no bikini atoll)

CNIDERIA Fan Coral Brain Coral Colonial Coral

CNIDARIA Barrier Reefs-Fringing

CNIDARIA Barrier Reefs-Barrier

CNIDARIA Barrier Reefs-Atoll

CNIDARIA Barrier Reefs-Bikini Atoll

CNIDARIA Barrier Reefs-NO Bikini Atoll

CNIDERIA: Wrap-ups 1.List four examples of Cnideria. 2.What are the main characteristics of the phylum Cnideria? 3.What is the difference between a medusa and a polyp? 4.How do Cnideria feed? 5.What are the three classes of Cnideria? Characteristics? Example?

CNIDERIA: Wrap-ups 6. What is the common name of Physalia? 7. What is the best treatment for a jellyfish sting? What is an urban legend for jellyfish sting treatment? 8. What is a Irukandji? How big? Where found? Why unusual? 9. What is a Sea Anemone? What animal forms a symbiotic relationship[p with an anemone? 10. Why are corals an important Cnideria?