ZooKeepers need to make sure the three-month-old Sumatran tigers will be able to survive if they enter water and paddle to safety.
Both Bandar and Sukacita have passed the test with flying colours, although they did not seem initially pleased with their lesson.
After getting the big cat equivalent of their swimming badge, the young cubs are now allowed to to explore the yard of their enclosure with their protective mother Dami.
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