The Flat Oyster (Ostrea edulis) is a bivalve mollusk found primarily in coastal waters of Europe. It has a distinctive, irregularly shaped shell that is typically gray or brown on the outside and white on the inside. Flat oysters are known for their delicate flavor and are often harvested for culinary purposes, particularly in seafood dishes. These oysters thrive in shallow waters and are usually found attached to rocks or other hard surfaces. They play a vital role in marine ecosystems by filtering water and providing habitat for various marine species. Conservation efforts are in place to protect their populations, as they have faced declines due to overfishing and habitat loss.