The fluffy cub cuddled keepers and appeared to want to make a bid for freedom as he was given a routine health check, which ascertained he is a boy.
Mum Victoria previously gave birth to Hamish, the UK's first polar bear cub in 25 years, in December 2017.
Keith Gilchrist, animal collection manager at Highland Wildlife Park said, "After watching Victoria and her cub closely on CCTV over the winter, it is very exciting to find out we have a little boy and that he is in good health.
"He is already becoming more confident every day and it is incredible to see him grow and develop.
"In the coming weeks we are going to be asking the public for their help in naming our newest arrival."
Public viewing is still closed to give Victoria and her youngster lots of peace and quiet.
In a few weeks, the cub will be introduced to his large outdoor enclosure, where the public will be able to try and spot him.
Keith added, "Like all the animals in our care, our polar bears play an important role in attracting and engaging thousands of visitors each year so they can learn about the threats animals face in the wild and the action they can take to help.