| Ostreidae (oysters) |
| 30 cm SHH (male/unsexed); max. reported age: 2 years |
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benthic; brackish; marine; depth range 0 - 79 m |
| Western Atlantic and the Mediterranean. Introduced in Northeast Atlantic and the Pacific Ocean. |
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Diagnostic features: Shell thick and heavy, usually narrow and elongate, but extremely variable in shape. Upper valve flatter, smaller than lower valve; lower valve convex. Shell shape and outline variable. Shell margins undulating straight. Umbones long and curved. Colour: dirty to light grey, internally white with muscle scar deep purple (Ref. 271). |
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Not Evaluated (N.E.) Ref. 123251)
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