Monogamous Animal Relationships (PHOTOS)

While it's practically impossible to find an animal species that's completely monogamous (unless you count the angler fish or the flatworm fish, where the monogamous relationship requires the actual fusing of the bodies), there are a handful of animals in the animal kingdom that have an affinity toward monogamy.

Whether you think their relationships are romantic or not is up to you, but a number of creatures -- from primates to birds to marine life -- have found that choosing to be monogamous is more beneficial than having multiple partners.

Since we recently highlighted promiscuous animals, we thought in honor of Valentine's Day, we wanted to celebrate some happy pairs.

Check out these photos of (mostly) monogamous animals and vote for the sweetest couple!