Mangrove forests (synonyms: mangrove swamps, mangals; example toponyms: The Forest of Roots) are coastal wetlands dominated by mangrove trees. These areas flood twice a day due to the tides. They are found in tropical areas such as tropical islands or along river deltas. Mangrove trees have extensive root systems, and these tangled areas are home to a high degree of biodiversity. They may be sites of fishing towns. In fictional worlds, mangrove forests may contain broad canopy areas that feature tree forts or treetop cities above the water below. Depending on the world, mangrove forests may be forests of giant trees.
When designing mangrove forests keep in mind that boat travel is the easiest way of navigating these locations. Consider the channels or routes through the root systems. The people that make their homes in these locations may use stilts to keep their abodes elevated above the tides and any potential storm flooding. They may have built dock networks or bridge systems to help maneuver through the dense forest.