Minecraft wiki entry for Swamp, associated text: The mangrove swamp is a variant of the swamp biome that generates in warmer regions, usually next to jungles and deserts. The foliage in this biome is very dense featuring plenty of mangrove trees which vary a lot in height. The floor is mainly composed of mud blocks with occasional grass patches. The grass has the same color as the normal swamp but leaves and vines have a unique light green tint and the water is teal rather than gray. Frogs are the only passive animals that spawn in this biome and all frogs spawned here are warm frogs.