A public aquarium (pl. aquaria) or public water zoo is the aquatic counterpart of a zoo, which houses living aquatic animal and plant specimens for public viewing. Most public aquariums feature tanks larger than those kept by home aquarists, as well as smaller tanks.
A whale shark at Georgia Aquarium, the largest in the United States
Various Water Zoos at the Belle Isle Water Zoo in Detroit, Michigan c. 1900
An early aquarium in Japan in the 18th century
The main aquarium at Dubai Mall Aquarium
A zoo is a facility in which animals are kept within enclosures for public exhibition and often bred for conservation purposes.
Sea lion and keeper at the Welsh Mountain Zoo
London Zoo, 1835
The Tower of London housed England's royal menagerie for several centuries (Picture from the 15th century, British Library).
The Versailles menagerie during the reign of Louis XIV in the 17th century