For thousands of years, people have caught and eaten fish and seafood. Today this has become a problem: The population has increased, and more fish and seafood need to be caught to feed all the people. This means that the populations of fish have less time to regenerate, and they get depleted, which is known as overfishing. Sustainable seafood is the idea of catching the fish, without putting the ecosystem they come from in danger. Sustainable seafood is either caught wild, or it is farmed, but without endangering the ecosystem, and giving the stocks a chance to grow. There are different non-profit organizations that watch over these rules. Special "labels" have been created so the consumer can see that the fish or seafood was bred or caught in accordance with these rules.