Mangrove sub Biomes

The Mangrove Biome is cool, but I would like to see varients and sub Biomes of mangrove swamps as well. Java and Bedrock have varied forest density, so they could be split into separate sub Biomes, like Jungle, and Jungle Edge. These could be Dense Mangrove Forest, and Mangrove Edge. Another idea would be the Mangrove canals, which appear when a river cuts through a mangrove swamp.