How oysters can stop a flood

In the last century, 85 percent of the world’s oyster reefs have vanished. And we’re only recently beginning to understand what that’s cost us: While they don’t look incredibly appealing from the shore, oysters are vital to bays and waterways around the world. A single oyster can filter up to 50 gallons of water every day. And over time, oysters form incredible reef structures that double as habitats for various species of fish, crabs, and other animals. In their absence, our coastlines have suffered.