It features upside-down Coral Shell Plates and Cave Crawlers who can be seen falling from the top to bottom. The entrance to the smallest of these caves can be found found right next to the Underwater Islands Wreck. The larger of the caves can be found on a bigger island. It houses more Fauna, such as Garryfish or Bonesharks and more materials. There are four entrances to this cave and three to the smaller one.