Moscow Zoo
In 2001, Marineland added walruses to the marine mammals it kept. The first walrus was "Sonja", from the Moscow Zoo. It was joined by "Zeus" and "Apollo" two months later and "Pandora", "Buttercup" and "Buddy" in 2002. Marineland added "Smooshi" and "Azul" in 2004. Sonja died in 2017, and Zeus died in 2018.