Sea World announces polar bear cub is male September 1, 2013 - 6:12PM Liya and her baby polar bear at Sea World. Sea World have announced that the first polar bear born at the park is a male. The cub was born at the Gold Coast theme park on May 9, making it the second polar bear born in Australia. The sex of the cub, which is expected to make its first public appearance later this month, wasn't announced until Sunday. The park's polar bear Liya gave birth to two cubs on May 9, but one died shortly after being born. The surviving boy weighed about 600 grams and was 15 centimetres long at birth. Newborn polar babies suffer high mortality rates but the boy cub is living well at 8 kilograms and nearly four months old. There are about 20,000 to 25,000 polar bears living in the wild worldwide.