This video shows conjoined Pacific gray whale calves that washed ashore in Mexico. Female gray whales give birth each winter in the warm waters off Mexico where they are safe from their primary predators, killer whales.
Unfortunately for these twins, absence of predators didn't make much of a difference to their survival. It's sad that these calves didn't make it, but not surprising given the physical limitations and the problems that being attached in this way would present to a wild animal. (Learn more about gray whales.)