File:Fossil coral (Florida, USA) 1 (24926240658).jpg
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Summary
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| Description |
Fossil coral from the Cenozoic of Florida, USA. (photo by Mary Ellen St. John) Scleractinians are significant reef-building organisms in Earth's warm, shallow oceans. They first appear in the Triassic and are the only group of stony corals in modern oceans (in the Paleozoic, tabulates and rugosans were the principal stony coral groups). Scleractinian corals consist of individuals or colonies of gelatinous polyps that secrete hard calcareous (CaCO3) skeletons. Most live in warm, tropical to subtropical, photic zone environments (the shallow portions of the world’s oceans where sunlight penetrates). Scleractinian corals are predators - they have stinging cells (nematocysts) in their tentacles that paralyze prey. They also obtain sustenance from microbes called zooxanthellae (usually dinoflagellates) that live in their tissues and need to be in sunlight to manufacture food by photosynthesis. The food is shared with the host coral animal. Classification: Animalia, Cnidaria, Anthozoa, Scleractinia Stratigraphy: undetermined Cenozoic unit (probably Pleistocene or Pliocene) Locality: undetermined quarry in Florida; used in roadside erosion control material in Ding Darling National Wildlife Refuge, Sanibel Island, Florida, USA |
| Date | |
| Source | Fossil coral (Florida, USA) 1 |
| Author | James St. John |
Licensing
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/24926240658 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:30, 5 December 2019 | | 1,386 × 1,480 (1.94 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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