And Ethir Anduin he saw, the mighty delta of the River, and myriads of sea-birds whirling like a white dust in the sun, and beneath them a green and silver sea, rippling in endless lines.

The Fellowship of the Ring, The Breaking of the Fellowship

The Mouths of Anduin, also called Ethir Anduin, is a biome located in southern Gondor where the Great River, Anduin, flows into the sea. It is a marshy biome and is mostly uninhabited.

This biomes terrain is simliar to that of most swampland biomes. Less trees are present and the biome mainly consists of open plains full of pools of water and quagmire.

Upon entering the Mouths of Anduin, the player earns the achievement "Ethir Anduin".


  • Uplands: A version of the marshes with fewer pools, higher land generation, and many more trees.
  • Lowlands: A variant of the marshes that is more or less flat, and is more like a vast pool choked with bits of land and quagmire.

There is no standard version of the Mouths of Anduin or any swamp biome.


There are no NPCs that spawn here, not even Orcs at night, but normal Minecraft mobs (farm animals and horses) do.

Mining Edit

All the normal ores spawn here, but beneath the dirt layer is a layer of Gondor rock. Gondor rock is used in crafting Gondor bricks and can also be found in patches underground.


Grass and fern plants commonly spawn here. If the player is lucky, there is a chance of finding Athelas at the same consistency as in the normal Gondor biome, although the water and quagmire makes the plant even rarer. Willow trees are common here.

The One Wiki to Rule Them All has an article on:

The Mouths of Anduin

Biomes of the Lord of the Rings Mod
List by Alphabet

AndrastAngleAngmarBarrow-downsBlackroot ValeBlue MountainsBree-landBrown Lands


ChetwoodColdfellsDagorladDaleDead MarshesDol GuldurDor-en-ErnilDorwinionDrúwaith IaurDunland


East BightEastern DesolationEmyn MuilEnedwaithEreborEregionEriadorEryn CaranEryn VornEttenmoorsFangorn ForestFar Harad (Bushland, Jungle, Mangrove, Savannah, Swampland, Volcano) • Field of CelebrantForodwaithGladden FieldsGondorGorgorothGrey MountainsHarad MountainsHarondor


Iron HillsIslandIthilienLamedonLebenninLindonLone-landsLong MarshesLossarnachLothlórien


MeneltarmaMidgewaterMinhiriathMirkwood (Northern) • Misty MountainsMordorMordor MountainsMorgulduinMorgul ValeMouths of AnduinMouths of EntwashNan CurunírNan UngolNear Harad (Fertile) • NindalfNorthern Forest|Northern ForestNorthlandsNúrnOld ForestOrocarniPelargirPelennor FieldsPertorogwaithPinnath Gelin


RhúdelRhûnRivendellRocky CoastlineRohanSea of NúrnenSwanfleetThe SeaThe ShireTolfalasTrollshaws


UdûnUruk HighlandsUmbarUtumnoVales of AnduinWeather HillsWhite DownsWhite MountainsWilderlandWoodland Realm

List by Region

AngleAngmarBarrow-downsBlue MountainsBree-landChetwoodColdfellsDunlandEnedwaithEregionEriadorEryn VornEttenmoorsLindonLone-landsMidgewaterMinhiriathOld ForestRivendellSwanfleetThe ShireTrollshawsWeather HillsWhite Downs


Brown LandsDagorladDaleDead MarshesDol GuldurEast BightEmyn MuilEreborField of CelebrantGladden FieldsGrey MountainsIron HillsLong MarshesLothlórienMirkwood (Northern) • Misty MountainsVales of AnduinWilderlandWoodland Realm


AndrastBlackroot ValeDor-en-ErnilDrúwaith IaurFangorn ForestGondorHarondorIthilienLamedonLebenninLossarnachMouths of AnduinMouths of EntwashNan CurunírNindalfPelargirPelennor FieldsPinnath GelinRohanTolfalasWhite Mountains


Eastern DesolationGorgorothMordorMordor MountainsMorgulduinMorgul ValeNan UngolNúrnSea of NúrnenUdûn


Far Harad (Bushland, Jungle, Mangrove, Savannah, Swampland, Volcano) • Harad MountainsNear Harad (Fertile) • PertorogwaithUmbar


DorwinionEryn CaranOrocarniRhúdelRhûn


ForodwaithNorthlandsNorthern ForestUtumno


IslandMeneltarmaRocky CoastlineThe Sea


Biome variantsDesertsForestsIslandsMountainsSwamps