The Heart of the Sea is a rare aquatic-related item that can be found inside treasure chests, which are obtained from following treasure maps located in shipwrecks and underwater ruins. This item is essential for crafting a Conduit, a block that provides players with the Conduit Power effect, granting enhanced underwater vision, faster mining speed underwater, and the ability to breathe underwater when activated within a specific radius and properly set up with prismarine blocks.
This item has no numerical item ID, therefore you must use the item ID to spawn the item. Numerical item IDs were removed in Minecraft version 1.13.
The item id for Heart of the Sea is minecraft:heart_of_the_sea
The item ID for Heart of the Sea is minecraft:heart_of_the_sea
This is the spawn command to give yourself Heart of the Sea in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give