Flat Oyster
Ostrea edulis
Sighting evidence at Borj el Kastil, Djerba
Colonies of flat oysters — now rare across much of the Mediterranean due to overharvesting — grow undisturbed on the protected masonry faces, serving as critical filter feeders that improve local water clarity. Their shells provide attachment surfaces for sponges, hydroids, and bryozoans that further increase biodiversity on the site. The species' recovery here reflects the passive protection offered by the site's cultural heritage status.
Evidence at this site
No confirmed records on file at this site
Flat Oyster is listed as a curated species here based on historical reports.