European flat oysters are filter feeders, like other oyster species. They play a vital role in maintaining the health of their environment by filtering large quantities of plankton, organic matter, and nutrients from the water. In doing so, they help improve water quality and clarity, creating a more balanced ecosystem. Oyster beds also provide a habitat for a variety of marine species, offering shelter and food for smaller fish, crabs, and other invertebrates. As such, they are a keystone species in coastal habitats.

However, overfishing and habitat degradation have led to a significant decline in their populations. Historically, European flat oysters were over-harvested for their shells and as a food source, contributing to their vulnerability. In more recent years, pollution, habitat loss, and the spread of diseases have further impacted their numbers. The introduction of non-native species, such as the Pacific oyster, has also posed challenges to the survival of the European flat oyster.

To help restore their populations, conservation efforts are underway, focusing on creating protected areas, sustainable harvesting practices, and restoring oyster beds. Restocking programmes are also in place, where hatcheries raise juvenile oysters for release into the wild, with the aim of rebuilding natural populations. These initiatives seek not only to protect the European flat oyster but also to restore the health and biodiversity of the ecosystems they support.

Despite the challenges, the European flat oyster remains a symbol of resilience in marine environments, and its distinctive, rich flavour continues to make it a highly sought-after delicacy in fine dining.

This specimen was collected in Exmouth on 03/09/1901.