Mystic Aquarium

Within the United States there are two stocks of wild Steller sea lions. The eastern stock is currently listed as a threatened species, though is fairly stable, whereas the western stock continues to decline and is listed as an endangered species. There are many theories as to why the western stock has declined so drastically.

African penguins are commonly displayed in zoos and aquariums throughout North America . Only a few facilities maintain their birds in saltwater exhibits, while the remainder are in freshwater. Supplementation with salt has been a long-standing practice in many facilities, yet there is disagreement amongst facilities as to whether penguins kept in freshwater require salt supplementation in their diets.