Minecraft wiki entry for Swamp, associated text: Swamps have elevations low enough to go below sea level throughout much of the area. A large portion of swamps are flooded, where patches of clay are found on the lakebed. Dry areas of this biome feature relatively flat terrain with a few tall grass and sparse oak trees. Water in swamps takes on a gray-green color at the surface, turning pale yellow when submerged in it. Unlike other Overworld biomes, swamps have varying temperatures, which affects the color of grass blocks, grass and leaves. Swamp vegetation includes dead bushes, mushrooms and oak trees which can grow in shallow water and generate with vines growing on them. Sugar cane is found often growing on shores, while seagrass litters the bottom of flooded areas. Besides dandelions and poppies, blue orchids grow among the grass while lily pads dot the surfaces of lakes; both are found exclusively in swamps. In Bedrock Edition, huge mushrooms can generate as well.