Subsistence fishing provides food for billions of people around the world. As human populations continue to rise, fishing technology becomes more efficient and advanced, and demand for fish increases, many of the nearshore fish become vulnerable to over-fishing. Coral reefs are home to many commercially important fish species such as grouper, snapper, and parrotfish, among many others. In some cases, fishers will preferentially target species of fish because they can sell them for higher profits or are the preferred fish to eat in the area. Management of the nearshore fish populations usually falls under the jurisdiction of the national government, however, in some cases, it is left to the smaller communities to manage their marine resources.