A Sea Lantern is a light-emitting block in the game Minecraft. It is crafted using prismarine crystals and prismarine shards, which are obtained from underwater temples. Sea Lanterns emit a bright light, making them useful for illuminating dark areas and preventing hostile mobs from spawning. In addition to their functional use, Sea Lanterns have a unique aesthetic appeal. Their vibrant colors and glowing effect make them popular for decorative purposes in builds. They can be placed underwater or on land, adding a beautiful touch to both aquatic and terrestrial environments in the game.