A story that's both nature and history - apparently, most of Europe used to have well-developed reefs of oysters along much of the coastline, but most of these were destroyed through over-fishing up to a century ago:
phys.org
Study reveals oyster reefs once thrived along Europe's coasts—now they're gone
Oysters once formed extensive reefs along much of Europe's coastline—but these complex ecosystems were destroyed over a century ago, new research shows. The paper, published in the journal Nature Sustainability, is titled "Records reveal the vast historical extent of European oyster reef...
