Sea Pickle

Sea pickles are light-emitting colonies of small stationary animals found underwater.

Obtaining
A sea pickle colony 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 pickle colonies generate on the bottom of warm oceans. They can also be found on top of coral blocks.

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 if they are underwater, and planted on living coral blocks. This will increase their number on that block, and spread to empty areas underwater above other living coral blocks. They can spread to the original sea pickle's level or one level below, out to a horizontal taxicap distance of 2. Bone meal can be used on sea pickles planted on other blocks, or outside of water, but nothing will happen and the bone meal will still be consumed.

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.

Gallery
Feuerwalze Cornichon de mer Sea Pickle 海泡菜