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	'''{{Animate\|Tube Coral Block JE1.png;Brain Coral Block JE1.png;Bubble Coral Block JE1.png;Fire Coral Block JE1.png;Horn Coral Block JE1.png;Dead Coral Block JE1.png\|32px}} [[Minecraft:Coral block]]s'''		'''{{Animate\|Tube Coral Block JE1.png;Brain Coral Block JE1.png;Bubble Coral Block JE1.png;Fire Coral Block JE1.png;Horn Coral Block JE1.png;Dead Coral Block JE1.png\|32px}} [[Minecraft:Coral block]]s'''
	* Come in 5 colors: blue, pink, purple, red, yellow.		* Come in 5 colors: blue, pink, purple, red, yellow.
	* Turn into dead coral when placed out of the water.		* Turn into [[Minecraft:Dead Coral Block\|dead coral]] when placed out of the [[Minecraft:water]].
	** Dead coral cannot be revived.		** Dead coral cannot be revived.
	* Only obtainable in the Creative inventory.		* Only obtainable in the [[Minecraft:Creative inventory]].

	=== World generation ===		=== World generation ===
	'''{{EnvLink\|Underwater ruins}}'''		'''{{EnvLink\|Underwater ruins}}'''
	* Come in many different shapes and sizes.		* Come in many different shapes and sizes.
	* Cold ruins can be found in cold and frozen ocean biomes regardless of depth.		* Cold ruins can be found in [[Minecraft:Cold Ocean\|cold]] and [[Minecraft:Frozen Ocean\|frozen ocean]] biomes regardless of depth.
	* Warm ruins can be found in warm, lukewarm, and deep lukewarm ocean biomes.		* Warm ruins can be found in [[Minecraft:Warm Ocean\|warm]], [[Minecraft:Lukewarm Ocean\|lukewarm]], and [[Minecraft:Deep Lukewarm Ocean\|deep lukewarm ocean]] biomes.
	* Can generate alone or as part of a big ruined village.		* Can generate alone or as part of a big ruined village.
	** Can also generate out of the water, slightly underground or slightly above sea level.		** Can also generate out of the water, slightly underground or slightly above [[Minecraft:sea level]].

	== Changes ==		== Changes ==
	=== Mobs ===		=== Mobs ===
	'''[[Minecraft:Phantom]]s'''		'''[[Minecraft:Phantom]]s'''
	* No longer spawn in the End.		* No longer spawn in [[Minecraft:the End]].
	* Now despawn during daytime.		* Now [[Minecraft:despawn]] during [[Minecraft:daytime]].

	=== Command format ===		=== Command format ===
	'''[[Minecraft:Tag]]s'''		'''[[Minecraft:Tag]]s'''
	* Added the vanilla block and item tag <code>minecraft:coral</code>.		* Added the vanilla block and item [[Minecraft:Block tag (Java Edition)\|tag]] <code>minecraft:coral</code>.
	* The <code>minecraft:water_hacked</code> tag now includes [[Minecraft:chest]]s.		* The <code>minecraft:water_hacked</code> tag now includes [[Minecraft:chest]]s.

	=== General ===		=== General ===
	'''Optimizations'''		'''Optimizations'''
	* Optimized particle rendering slightly		* Optimized [[Minecraft:Particles\|particle]] rendering slightly.

	== Fixes ==		== Fixes ==

SyncBot: Sync: new page from Minecraft

2026-04-16T11:10:40Z

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New page

{{Infobox version
|title=Minecraft 18w09a
|edition=Java
|image=18w09a.png
|image2=Java Edition 18w09a.png
|type=Snapshot
|date=March 1, 2018
|parent=1.13
|clienthash=701085c1b668d45b7c0ee5ea911b11d6691c01bc
|jsonhash=2363421af13b87a427a32273f733f628db3bc262
|serverhash=57dd2fe4a2fdb6e846b978e77442465d2ea27f43
|prevparent=1.12.2
|prev=18w08b
|next=18w10a
|nextparent=1.13.1
}}
<onlyinclude>

'''18w09a''' is the twenty-third [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.13]], released on March 1, 2018,<ref>{{snap|18w09a|March 1, 2018}}</ref> which added [[Minecraft:coral block]]s and [[Minecraft:underwater ruins]].

== Additions ==
=== Blocks ===
'''{{Animate|Tube Coral Block JE1.png;Brain Coral Block JE1.png;Bubble Coral Block JE1.png;Fire Coral Block JE1.png;Horn Coral Block JE1.png;Dead Coral Block JE1.png|32px}} [[Minecraft:Coral block]]s'''
* Come in 5 colors: blue, pink, purple, red, yellow.
* Turn into dead coral when placed out of the water.
** Dead coral cannot be revived.
* Only obtainable in the Creative inventory.

=== World generation ===
'''{{EnvLink|Underwater ruins}}'''
* Come in many different shapes and sizes.
* Cold ruins can be found in cold and frozen ocean biomes regardless of depth.
* Warm ruins can be found in warm, lukewarm, and deep lukewarm ocean biomes.
* Can generate alone or as part of a big ruined village.
** Can also generate out of the water, slightly underground or slightly above sea level.

== Changes ==
=== Mobs ===
'''[[Minecraft:Phantom]]s'''
* No longer spawn in the End.
* Now despawn during daytime.

=== Command format ===
'''[[Minecraft:Tag]]s'''
* Added the vanilla block and item tag <code>minecraft:coral</code>.
* The <code>minecraft:water_hacked</code> tag now includes [[Minecraft:chest]]s.

=== General ===
'''Optimizations'''
* Optimized particle rendering slightly

== Fixes ==
{{fixes|fixedin=18w09a|prefix=Minecraft
|;old
|118324|One of magenta dye recipes is unlocked via getting Ink Sac
|118416|Recipe for bowl not unlocked until bowl or mushrooms are obtained
|;dev
|125141|Witch huts generated by new world generator don't spawn witches
|125451|Crash when logging into multiplayer without logging into singleplayer first
|;previous
|126150|Furnaces don't account for multiple recipes with the same output when giving experience and smelting recipes
|126111|Furnaces don't award recipes or experience when output is taken after a reload
}}</onlyinclude>

== Videos ==
{{slicedlime|SYVIHsEDkPI}}

== Trivia ==
* Unlike most of the first-of-the-week snapshots, this was released on a Thursday instead of Wednesday, similar to the snapshots before [[Minecraft:14w26a]].
* 18w09a was released exactly 6 years after [[Minecraft:Java Edition 1.2.1|1.2.1]] and [[Minecraft:Java Edition 1.2.2|1.2.2]].

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.1x}}

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Minecraft:Java Edition 18w09a - Revision history

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