High Quality Content by WIKIPEDIA articles! Laguna de Terminos (Terminos Lagoon) is made up of a series of rich, sediment-laden lagoons and tidal estuaries connected by two channels to the Bay of Campeche in the southern part of Gulf of Mexico, in Carmen Municipality in the southwestern part of the Mexican state of Campeche. Its shores are swampy and support mangroves. It is fed by several fresh water rivers, including the Mezcapala, Grijalva and Usumacinta Rivers, and includes several lagoons such as Pom, Atasta, Puerto Rico, Este and Panlau. It is about 112.5 square km in area (about 50 miles long and 20 miles wide). Every nine days, approximately 50% of the lagoon's water volume is renewed, primarily through the effect of ocean tides. Twenty-nine percent of the lagoon is covered with seagrass. The lagoon was designated as a federally protected area for flora and fauna in 1994 by the Mexican government because of the importance of the biological ecosystems provided by its estuaries....