“Then I stood still, forgetting war in Middle-Earth; for their wailing voices spoke to me of the Sea. The Sea! Alas! I have not yet beheld it. But deep in the hearts of all my kindred lies the sea-longing, which is perilous to stir. Alas! for the gulls. No peace shall I have again under beech or under elm.”

–-Legolas, The Return of the King, The Last Debate

The Sea is an extremely large biome surrounding Middle-Earth and is, as the name suggests, an ocean. This biome represents Belegaer, the Sundering Seas, the great western ocean of Arda. It surrounds all of Middle Earth, and is infinite.

It is mostly entirely made of water, and home to Fish, Seagull and squid, but there are islands that may contain mobs in the future. These islands are barren, with the exception of small Númenórean ruins scattered around. The colour of the water in the ocean will change depending on the player's latitude. Ice will also start forming as the player travels far north.

Upon reaching this vast body of water the player gains the achievement "To the Sea!" and the title of Mariner.

North of z -60000 the sea is completely frozen over, south of that small gaps in the ice become gradually more common until z -45000 where small ice burgs fill the sea and larger areas of open water are visible, with the ice again gradually becoming less common until z -30000, where it stops appearing at all. Snow placement on island biomes in the northern ocean appears to follow a similar pattern.

Sub-biomes Edit

The sea technically has two sub-biomes: Beach and Meneltarma. We list 'Island' as a third sub-biome here, as it is a distinct biotope, peeking above the surf marking the sea surface.

Island Edit

Islands are randomly generated in the sea as well as in specific locations, representing a few very specific islands. No people are known to currently inhabit these islands, although at a time they were part of Beleriand. oak, birch and beech trees dominate the flora.

Beach Edit

This biome generates where the sea meets the land. It's mostly sand. Most of Middle-earth's coastlines consist of this biome, although there are also some rocky coastlines. There is also a white beach variant, made of white sand and a gravel beach.

Meneltarma Edit

This is a special island with its own distinct features. Its origin and aspects are all explained on this dedicated page: Meneltarma.

Climate zones Edit

The sea has climate zones that determine the presence of sea ice and palm trees.

Arctic Edit

The arctic zone is characterised by an area where part to all of the top layer of the sea is frozen and covered under a sheet of sea ice. This zone is situated north of the area bordered by z coordinate -30000. The farther north one travels, the denser the coverage of ice. North of z coordinate -60000, the ice shelf is fully closed.

Tropics Edit

The subtropical zone is characterised by the presence of palm trees, both on the beaches and islands in the sea. This zone stretches from z coordinate 64000 down to the farthest southern tip of Far Harad. The presence of palm trees gradually increases whil going further south from z coordinates 64000 to 130000.

Structures Edit

One structure spawns in the sea, and one on the beaches and islands (except Meneltarma).

  • Underwater Elven Ruin (submerged only) - These ruins are composed of Elven brick, with some glowstone and a chest, containing valuable loot. Despite the risk it would take to dive down, the reward is often worth it, as these ruins have been known to contain mithril.
  • Númenórean Ruin (on land only) - Dilapidated towers of stone brick, remnants of Numenorean colonies. They are hollow and often contain a single tree.

One can also stumble upon various types of smaller ruined structures on the islands and beaches.

Mobs Edit

No sentient creatures inhabit the oceans and islands. The waters are alive and host many shoals of squid and Fish. And its shores are dominated by the ever presence noise and flapping of seagulls.
The many scattered islands, including the three islands visible on the map, host many types of non-domesticated common animal wildlife, survivors of ages past. Notably there is no Rabbit, Bird or Butterfly of any kind.

Mining Edit

The underground of oceans and seas contains two and a half times as much rock salt as any other biome of Middle-earth. In the sands and soils of oceanic islands and shores, up to elevation levels 80, there is an additional small chance to also hit rock salt deposits.

The sea also has an abundance in coral, that can be found to grow on coral reef blocks.

Netx to salt and coral, there is a third valuable resources to be found here: sponges!

Gallery Edit

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

The Great Sea

The Tolkien Gateway has an article on:

The Great Sea

Biomes of the Lord of the Rings Mod
List by Alphabet

AndrastAngleAngmarBarrow-downsBlackroot ValeBlue MountainsBree-landBrown Lands


ChetwoodColdfellsCorsair CoastsDagorladDaleDead MarshesDol GuldurDor-en-ErnilDorwinionDrúwaith IaurDunland


East BightEastern DesolationEmyn MuilEnedwaithEreborEregionEriadorEryn CaranEryn VornEttenmoorsFangornFar Harad (Bushland, Grasslands, Jungle, Mangrove, Swampland, Volcano) • Field of CelebrantForodwaithGladden FieldsGondorGreat DesertGulf of HaradGorgorothGrey MountainsHarad MountainsHarnedorHarondor


Iron HillsIslandIthilienKanuka ForestLamedonLebenninLindonLone-landsLong MarshesLossarnachLostladenLothlórien


MeneltarmaMidgewaterMinhiriathMirkwood (Northern) • Misty MountainsMordorMordor MountainsMorgulduinMorgul ValeMouths of AnduinMouths of EntwashNan CurunírNan UngolNear HaradNindalfNorthern ForestNorthlandsNúrnOld ForestOrocarniPelargirPelennor FieldsPertorogwaithPinnath Gelin


RhúdelRhûnRivendellRohanSea of NúrnenSouthron CoastsSwanfleetTaur-na-TorogrimThe 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 IaurFangornGondorHarondorIthilienLamedonLebenninLossarnachMouths of AnduinMouths of EntwashNan CurunírNindalfPelargirPelennor FieldsPinnath GelinRohanTolfalasWhite Mountains


Eastern DesolationGorgorothMordor (Biome)Mordor MountainsMorgulduinMorgul ValeNan UngolNúrnSea of NúrnenUdûn


Corsair CoastsFar Harad (Bushland, Grasslands, Jungle, Kanuka Forest, Mangrove, Swampland, Volcano) • Great DesertGulf of HaradHarad MountainsHarnedorLostladenNear HaradPertorogwaithSouthron CoastsTaur-na-TorogrimUmbar


DorwinionEryn CaranOrocarniRhúdelRhûn


ForodwaithNorthlandsNorthern ForestUtumno


IslandMeneltarmaThe Sea



Start a Discussion Discussions about The Sea

  • [Endorsed] New Biomes for rivers and Oceans.

    17 messages
    • MilkMC wrote: ''Zombielizard wrote: ...underwater elven ruins can spawn in any 'ocean biome' at least to...
    • Dwarf ships are also completely non-canonical. Dwarves hate the sea, and avoid it at all costs
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