Ocean Monument

Ocean Monuments are Generated Structures that will be added in Update 0.16.0. They spawn in Deep Oceans and are made up of Prismarine Blocks.

Mobs

 * Guardians
 * Elder Guardians

Treasure
An Ocean Monument can contain the following treasure:
 * Blocks of Gold
 * Wet Sponge

Trivia

 * Ocean Monuments contain several Blocks of Gold, making them useful for making Golden Apples.