{
  "feature": "minecraft:warm_ocean_vegetation",
  "placement": [
    {
      "type": "minecraft:noise_based_count",
      "noise_factor": 400.0,
      "noise_offset": 0.0,
      "noise_to_count_ratio": 20
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:heightmap",
      "heightmap": "OCEAN_FLOOR_WG"
    },
    {
      "type": "minecraft:biome"
    }
  ]
}