Features of a Coral Polyp Grade 3 Unit 3 Lesson 2.
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Transcript of Features of a Coral Polyp Grade 3 Unit 3 Lesson 2.
![Page 1: Features of a Coral Polyp Grade 3 Unit 3 Lesson 2.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649e415503460f94b32d86/html5/thumbnails/1.jpg)
Features of a Coral PolypGrade 3 Unit 3 Lesson 2
![Page 2: Features of a Coral Polyp Grade 3 Unit 3 Lesson 2.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649e415503460f94b32d86/html5/thumbnails/2.jpg)
Corals belong to the phylum Cnidaria
Medusa or polyp body forms as adults
Stinging cells called nematocysts
Only one body cavity with a single opening
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Reef coral is made of many small individual animals called polyps.
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What’s a polyp?
• The basic body form of a coral animal
• Structure like a sac with two walls of cells
• The open end bears the mouth, which is surrounded by tentacles
mouth/anustentacle
body stalk
epidermis
mesoglea
gastrodermisgastrovascular
cavity
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Coral as PredatorsCoral must eat - it’s a consumer!
Nematocysts are used to sting, catch, and kill prey
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Stinging cells also protect
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Coral Reproduction:
Budding
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Coral Reproduction:
Broadcast Spawning
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Is it a plant?
• Polyps have symbiotic algae, called zooxanthellae living in their cells
• Zooxanthellae make food for the polyp through photosynthesis
It has a plant living inside it!
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Symbiosis:coral & zooxanthellae
• symbiosis: a close relationship between two organisms usually based on food
• If the zooxanthellae feeds the coral, what does the zooxanthellae get out of the relationship?
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Is it a rock?It’s a type of rock!
Coral polyps make a stony structure out of calcium carbonate in which they live
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Common Hawaiian Coral
Rice Coral
Antler Coral
Cauliflower Coral
Lobe Coral
1
Finger coral
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More Hawaiian Coral
Mushroom Coral
Black Coral
Table Coral
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Coral is in dangerOcean water is getting warmer
When water gets too warm, zooxanthellae leave the coral tissue
When zooxanthellae leave, corals lose their color AND food supply
CoralBleachin
g
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Coral is in danger:Human Impacts on Coral
• Pollution
• Tourism
• Aquarium/Souvenir Trade
• Overfishing
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Hawaiian coral needs your protection
• It has no voice• Speak up to educate others about our beautiful coral
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The End