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| Ostrea equestris | |
|---|---|
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Ostreida |
| Family: | Ostreidae |
| Genus: | Ostrea |
| Species: | O. equestris
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| Binomial name | |
| Ostrea equestris Say, 1834
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Ostrea equestris, commonly known as the crested oyster or horse oyster,[1] is a species of bivalve mollusc in the family Ostreidae. It can be found along the Atlantic coast of North and South America, ranging from Virginia to Patagonia.