Have stinging cells ( a must to be a cnidarian ) to capture prey Have radial symmetry
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Transcript of Have stinging cells ( a must to be a cnidarian ) to capture prey Have radial symmetry
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Have stinging cells (a must to be a cnidarian) to capture preyHave radial symmetryCentral pointSoft Corals, Hard Corals, Sea Fans, Hydra, Jellyfish, Sea Anemones
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Create coral reefs at growths of inch per yearDeposit skeleton of calcium carbonate (limestone)Photosynthetic and symbiotic dinoflagellates (zooxanthellae) live within coral structure and provide energy to growing coral.
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Toxins in nematocysts are quite potentOf the 9,000 to 10,000 cnidarians, only a handful pose a threat to humansIn most cases, nematocysts are not strong enough to penetrate skin
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Organ Pipe Coral
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Sea Surface Temperature Changes
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StomachMouth
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Distinct floats that allow wind to push them through the water
Sting can be life threatening
Tentacles exceed 40 meters (131 ft) in length
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Lives in tentacles of Man-of-War jellyfish much like a clownfish lives in an anemone
Immune to sting
Use jellyfish for protection in open ocean
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Most dangerous to humansPotent toxin can kill an adult human within minutesCause paralysis and lyse blood cellsFortunately, rare in most parts of world