A "natural aquarium" refers to a body of water, like a pond or lake, where underwater plants, fishes, and other living things can thrive without human interference or artificial additives. Full definition
This 40 minute scenic flight takes you over the world's biggest natural aquarium showing you the vibrant and ever changing colours of the sea below. (thetourspecialists.com.au)
Enjoy a snorkel tour and swim in the crystal clear waters of the underground river, have fun with the Dolphin swim and visit the wonderful natural aquarium with its coral gardens. (isla-mujeres.net)
Demian Petryshyn goes inward, to his apartment, where he expands space through the minutia of natural aquarium cultivation. (csaspace.blogspot.ru)