Mangrove Swamps are essentially an alternate version of the normal swamp biomes in Minecraft, featuring deeper water, frogs, fish, and the unique red wood of mangrove trees.
Top 5 Mangrove Swamp 1.20 Seeds – Bedrock Edition
They were introduced in The Wild Update in Minecraft 1.19, along with Ancient Cities. If you want to experience them in their full glory, this list contains some of the best, most unique, largest, and most resource-filled Mangrove Swamps that exist in Minecraft 1.21.
While the structures of the two versions may differ, these seeds work perfectly whether you are playing Minecraft Bedrock Edition or Java Edition.
Seed: -2409420028618844403