Demand for fish is on the rise worldwide—fish consumption has spiked 122 percent in the last three decades, according to the United Nations.

At least 3 billion people rely on seafood as a primary source of protein, according to the World Wildlife Fund. And the U.N. Food and Agriculture Organization (FAO) reports that nearly 60 million people make a living fishing or farming fish.

But the world’s fisheries face various threats. Overfishing, illegal fishing, climate change, habitat loss, and pollution have halved the world’s fish population since 1970. The FAO says that today 90 percent of the world’s stocks are currently overfished or depleted.