The zoo is phasing out its elephant exhibit and adding koalas.
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The duo will live at the foot of Glacier Run with fellow Australian species in an habitat near Lorikeet Landing.
According to a news release, the zoo will celebrate Punch the elephant's 53rd birthday, as well as polar bear Qannik's 12th birthday.
The median life expectancy for a California sea lion in a managed system is 23.3 years, according to the Louisville Zoo.
The seal pup has been weaned from his mom and is now perfecting his swimming skills.
The 30-year-old California sea lion was one of the Zoo's animal ambassadors.