Minecraft wiki entry for Drowned_farming, associated text: The basic flooded-dungeon drowned farm described in this tutorial is quick and simple to construct in survival mode. It isn't automatic, however. It requires your involvement to harvest items from the drowned. While it doesn't yield tridents (and doesn't yield nautilus shells in Java Edition), that farm is still useful for a survival-mode zombie loot farm to get experience, tools, armor, and weapons with occasional interesting enchantments, as well as other items — without needing to build a deep falling pit or a tall structure in the sky.