Recreate rocky landscapes in your aquarium with the Marina Polyresin Cave Aquarium Décor. This natural-looking structure recreates the look and feel of an underwater cavern. Fish instinctively seek out places to hide， and this tiny grotto provides the perfect spot for hiding and swimming. For added realism， the cave is painted gray with white and green mossy highlights and includes a plastic Amazon Sword plant. It’s made from nontoxic materials， so it’s safe for fish and won’t affect water chemistry.