Sistema Estuarino Boca del Cielo.02/02/08; Chiapas; 8,931 ha; 15°48'N 93°35'W. Marine Turtle Reserve. Coastal wetland with predominantly dune and coastal brush vegetation. The site is important for the spawning of three endangered turtle species: Lepidochelys olivacea, Dermochelys coriacea, and Chelonia agassizi. The marshes and channels are strongly influenced by mangrove vegetation, including Rhizophora mangle, Laguncularia racemosa, Avicenia germinans and Conocarpus erecta. The system supports endangered and threatened species of migratory and resident birds, and commercial and subsistence fishing is practiced along the beaches. The main threats include the plundering of turtle nests, pollution of the spawning zones, the construction of infrastructure and tourist development, tropical depressions, thunderstorms, and hurricanes that lead to flooding. Environmental education and public awareness programs are developed through a project for the conservation and protection of marine turtles. Ramsar site no. 1770. Most recent RIS information: 2008.