In the animal kingdom, there are relatively few animals that conform to the concept of monogamous marriage. However, most penguins can be said to be monogamous. Penguins are very loyal to their mates, and after they find a mate, they will not provoke other penguins of the opposite sex. Of course, there may be some "derailed" penguins, but after all, this is a minority, most penguins are very loyal.
Male and female penguins incubate and raise chicks together. When the breeding season comes, male and female penguins will look for their mates, they will find a suitable place to live together, and then mate. After the female penguin has laid the eggs, some males will hatch the eggs on their feet. After the chick hatches, the female and male take turns caring for the chick until they can live independently.
As mentioned above, penguins are monogamous. In fact, penguins are not only monogamous, but may only have one mate for life, rather than looking for the next mate after divorce like humans. Most penguins are very loyal to their chosen mate, and when one of them dies unexpectedly for various reasons, the other will not look for another mate, but choose to die for love. However, not all penguins are like this, penguins have more varieties, there will be exceptions. Emperor penguins, for example, may change their mates once a year.