Penn Plax Temple of Dolphins Aquarium Ornament - Medium - 13.5L x 10W x 8.5H in. The lost city of Atlantis temple of the dolphins is great for both fresh and salt water tanks; The lost city of Atlantis temple of the dolphins is beautifully handcrafted and makes the perfect addition to any underwater habitat; Its dimensions are approximately 13-1/2-inch by 10-inch by 8-1/2-inch;