Sea Pickle

Sea pickles (also known as Sea cucumbers) are light-emitting plants found underwater.

Obtaining
A sea pickle will break instantly and drop itself as an item if broken using anything, or if the block below it breaks, dropping as many pickles as there are on the block.

Natural generation
Sea pickles generate near, or on top of coral blocks in warm oceans and lukewarm oceans.

Usage
Sea pickles can be placed on top of most solid blocks, up to four per block, similarly to turtle eggs. They produce light when underwater, each additional pickle adds 3 light levels.

Bone meal can be on sea pickles, causing them to spread if underwater and on top of any coral block. Bone meal does not spread them if they are on top of any block other than a coral block, or exposed to air, but will still consume the bone meal.

Trivia

 * They appear to be based on sea pickles, a real-life tunicate with blue-green bioluminescence.
 * If played on "moody" brightness setting (or low brightness percentage such as 30%), Sea Pickles at the bottom of the ocean will appear to give off red-orange light.

History
Cornichon de mer