A fight between two love rival penguins has gone viral.
The fierce fight breaks out when the "husband penguin" comes home to find his wife with another penguin.
Sadly, the cuckholded penguin loses the bloody battle and the mother of his children chooses to stay with her illicit lover.
Footage of the encounter has been released as a preview of an "Animal Fight Night" series which starts on the National Geographic Channel on November 26.