Mangroves (aka Mangrove Forest Biome, Mangrove Swamp and Mangrove Forest) -Mangroves contain a variety of tropical evergreen trees or shrubs that grow in shallow coastal waters. Mangroves live life on the edge. Mangroves half on land and half in the sea. The environment is a challenge for many traditional plants and trees, with excessive heat, choking mud, and extremely high salt levels. Yet the mangroves form one of the most productive and biologically complex ecosystems on Earth.