Coral Block

A coral block is a solid block that comes in five variants: tube, brain, bubble, fire, and horn.

A dead coral block is a dead variant of a coral block.

Natural generation
Coral blocks and dead coral blocks naturally generate in coral reef structures. These are found in warm oceans.

Obtaining
Coral blocks can only be obtained with a pickaxe enchanted with Silk Touch, otherwise, they drop the respective dead coral block. Dead coral blocks can be obtained with any type of pickaxe.

Trading
$$, one coral block can be bought from wandering traders for 3 emeralds, while $$, 3 of the same coral block can be bought for 1 emerald.

Usage
Coral blocks and their dead variants can be used as building or decoration blocks.

Sea pickle farm blocks
Coral blocks grow sea pickles when bone meal is used on them. Additionally, if sea pickles are planted on coral blocks, using bone meal on the sea pickles increases the number of sea pickles and creates more sea pickles on nearby coral blocks. Specifically, they can spread to the original sea pickle's level or one level below, out to a horizontal taxicab distance of 2. This is the only way to farm renewable sea pickles.

Dead coral blocks
In order for a coral block to stay alive, at least one of the six directly adjacent blocks must be water. If placed outside of water, it transforms into its respective dead coral block after a few seconds &mdash; a grayscale version of the coral block.

ID
Java Edition:

Bedrock Edition:

Block data
In Bedrock Edition coral blocks have the following block data:

Trivia

 * After players had placed 10 million coral blocks underwater $$, Mojang donated US$100,000 to The Nature Conservancy to protect and restore coral reefs around the world.