Beluga whales, the number one threat to nuptials. Now you know!

Nothing says "Valentine's Day" like two penguins in captivity forced to parade around in a remote-controlled vehicle while people take pictures of their "wedding." Yesiree, that's not soul-blisteringly depressing or anything. Nope, not one bit...

Check out Cheezburger's Ode to Cupid!

Careful you don't inadvertently raise that tank's temperature. Our aquatic friends are not only bashful, their habitats are so very fragile.