Oysters are expensive today, but used to be so common that they were practically free. Environmental damage and overfishing have made oysters very rare.
Pearls in Oysters
History of Oysters
More Info on Corals and Reefs
- Coral Reef Restoration
- Great Barrier Reef
- Artificial Reefs
- Reef Aquariums
- Ocean Acidification
- Start a Business: Sell Corals
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