The Darien mangrove swamps lie around estuaries in eastern Panama in the Darien National Park, adjacent to the Gulf of Panama. Here, the roots of mangroves create a haven for mollusks, crustaceans, and many fish species. Shrimp are particularly abundant—the larvae hatch offshore, migrate to the mangrove “nursery” for a few months, and then return to sea as adults. Some of the mangrove swamps in this region have been converted to shrimp ponds or farmland. Other threats include urbanization and pollution.