A fight breaks out when a husband comes home and finds his wife with another penguin. pic.twitter.com/9ejYGcJ5TJ — Nat Geo Channel (@NatGeoChannel) November 4, 2016

Penguins aren’t the lovable critters you think they are.

A nearly 3-minute video tweeted by the National Geographic Channel on Friday is more fierce than any prosthetic leg-throwing antics from the “Real Housewives.”

In the clip, a male penguin returns home to his “wife” — only to discover another male penguin in his place.



The two birds brutally fight in a duel more vicious than UFC’s Ronda Rousey vs. Holly Holm. Both roll around on the ground, pecking at and biting each other with their beaks. The two penguins are both covered in blood by the end of the clip, with the husband winning back control of his nest — and his unfaithful wife.

This is far from penguins’ most upsetting behavior. A lover’s quarrel seems relatively sweet compared to other horror stories of the Arctic animals — such as male penguins being so perverse that they will mate with injured females, lost chicks and corpses.

One study placed a dead penguin’s corpse, frozen in the mating posture, in a field of penguins, which the males found “irresistible.”

Then the study placed “just the frozen head of the penguin” on a rock, which didn’t deter the randy penguins.

Try enjoying “March of the Penguins” now.