{
    "feature": "kattersstructures:dead_corals",
    "placement": [
      {
        "type": "minecraft:count_on_every_layer",
        "count": 50
      },
      {
        "type": "minecraft:biome"
      },
      {
        "type": "minecraft:block_predicate_filter",
        "predicate": {
          "type": "minecraft:all_of",
          "predicates": [
            {
              "type": "minecraft:matching_blocks",
              "offset": [
                0,
                -1,
                0
              ],
              "blocks": [
                "minecraft:sand",
                "minecraft:sandstone",
                "minecraft:dead_brain_coral_block",
                "minecraft:dead_bubble_coral_block"
              ]
            }
          ]
        }
      }
    ]
  }