The Sea Lantern is a light-emitting block that provides a bright, water-friendly light source. It emits a light level of 15, making it one of the brightest blocks in Minecraft. It is commonly used for underwater lighting, ocean-themed builds, and Redstone contraptions. A Sea Lantern is crafted using 4 Prismarine Shards and 5 Prismarine Crystals in a 3×3 crafting grid. It also generates naturally in Ocean Monuments, where it serves as a primary light source within the structure.
A Sea Lantern can be placed both on land and underwater. Unlike Torches or Lanterns, it does not break when submerged, making it ideal for underwater bases, pools, and aquariums. It also plays a role in conduit power setups, which enhance underwater exploration.
A Sea Lantern can be mined with any tool, but Silk Touch is required to collect it as a full block. Without Silk Touch, it drops Prismarine Crystals, requiring additional materials to craft back into a Sea Lantern.