Species · GBIF taxon 2286060
European Flat Oyster
Ostrea edulisAlso known as Colchester Native Oyster, Mud Oyster, Edible Oyster, Belon Oyster
European flat oysters anchor themselves to hard substrates in shallow coastal waters, creating complex biogenic reefs that shelter hundreds of other marine species. These efficient filter feeders pump up to 240 liters of seawater daily, clearing suspended sediments and promoting healthy, sunlit estuaries. Unlike their cupped relatives, they possess a distinctive, rounded, plate-like shell with delicate, flaky layers.
MarineBivalveReef-builder
Licensed referenceUnknown / CC-BY · cc-by
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Phytoplankton
- Microalgae
- Detritus
Predators
- Common Starfish
- Shore Crabs
- Eurasian Oystercatcher
ThreatsOverfishing, habitat destruction, pollution, and the parasite Bonamia ostreae
HabitatsEstuaries, shallow coastal bays, and muddy or sandy seabeds
Life spanUp to 15 years
Size / weightNot available
Classification
- FamilyOstreidae
- SpeciesOstrea edulis
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Shells are extremely sharp; wear thick-soled water shoes when exploring oyster beds.
- What to notice
- Look for flat, pear-shaped, yellowish-grey shells with delicate, concentric laminations in shallow coastal waters.
- Support conservation
- Avoid disturbing wild oyster beds and support local reef restoration initiatives.
Responsible observation
- Watch the Tides: Explore rocky shores and mudflats during extreme low tides to spot wild beds.
- Tread Lightly: Avoid stepping directly on the fragile, layered shells to prevent crushing them.
- Support Restoration: Participate in local citizen science projects mapping historic oyster reef locations.
Competitor Unknown / CC-BY · cc-by
Predator (c) Bernard Picton, some rights reserved (CC BY), uploaded by Bernard Picton · cc-by
Predator Andreas Trepte / CC BY-SA 2.5 · cc-by-sa
Close Relative Unknown / CC-BY · cc-by
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