River

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Rivers are common technical biomes. They serve as borders between various other biomes, and usually lead to ocean biomes, though they can occasionally form circles.

Description[edit]

Rivers are thin, lengthy biomes that frequently generate across the world. They typically serve as a division between two different biomes, but can also split a single biome in two. They are filled with water up to sea level, though rivers may run dry in certain areas due to higher than usual elevation. Exposed grass in river biomes takes on a bluish-green hue. Riverbeds consist of dirt, sand, gravel, and clay, and are the only places where clay generates aside from lakes, swamp marshes and ocean hilltops. Seagrass generates atop the riverbed, and sugar cane occasionally generates on the riverbank. Passive mobs cannot spawn within river biomes themselves, but frequently wander into them from the surrounding biomes if they can spawn there. Hostile mobs can spawn within rivers, however, and drowned can spawn underwater, as can salmon and squid.

When generated between two high-elevation biomes, such as mountains and hills, river biomes may pose a fall damage hazard, but are otherwise mostly harmless.

If this biome is used to generate a buffet world, it will look like a shallow ocean, of no more than 10 blocks deep, with mostly sand, dirt, clay and gravel floor and infrequent grassy islands that rarely contain oak trees and, more rarely, pumpkins.

Variants[edit]

There are two different river biomes.

River[edit]


River
River.png
Type

Medium/Lush

Rarity

Very common

Temperature

0.5

Blocks


Water


Grass Block


Dirt


Clay


Sand


Gravel


Sugar cane


Seagrass

Data value

dec: 7 hex: 7 bin: 111

Biome ID
river

The standard river variant. Salmon and squid may spawn here.

Frozen River[edit]


Frozen River
Frozen River.png
Type

Snowy

Rarity

Uncommon

Temperature

0.0

Blocks


Ice


Water


Grass Block


Dirt


Clay


Sand


Gravel


Seagrass

Data value

dec: 11 hex: B bin: 1011

Biome ID
frozen_river

Frozen Rivers replace regular rivers, and only generate within snowy tundra biomes. As the name implies, the top layer of water is entirely frozen, though below the ice is the usual sand, gravel, and clay. While sugar cane can generate alongside a frozen riverbank, it quickly uproots itself after generation due to the water being frozen. Along with drowned, strays can spawn in frozen rivers.

Note that frozen rivers can only cut through snowy tundra, not its variants; if a river generates separating the snowy tundra from one of its variants or any other biome, it will only be partially frozen.

History[edit]

Java Edition Alpha
1.2 Added true biomes, including rivers.
Java Edition Beta
August 18, 2011Notch tweeted a screenshot of a revamped river biome.
Java Edition
1.13 18w16a Cleaned up several biome names, mainly by adding missing spaces and changing "Biome M" for "Mutated Biome".
Pocket Edition Alpha
0.1.0 Added biomes, including rivers.

Trivia[edit]

  • Lakes can technically still generate in the waters of rivers and frozen rivers, when either are used as buffet worlds. This can be more clearly seen in frozen river worlds, as holes in the ice.

Gallery[edit]

See also[edit]