That time a snake wore a decapitated fish head plus 9 other bizarro animal moments

In 1856 Charles Darwin penned a letter to his pal J.D. Hooker, whom he affectionately addressed as "My dear Hooker." In that message the revolutionary behind evolutionary theory touched on the question of whether jellyfish take in sperm orally. He then darkly remarked, "What a book a Devil's chaplain might write on the clumsy, wasteful, blundering low & horridly cruel works of nature!"
Clearly, Darwin needed to vent to his dear Hooker about the weirdness he witnessed in the wild. Nature had filled his head with thoughts of jellyfish drinking baby-making juice and probably exposed him to the kinds of deaths that would give serial killers nightmares. Such scenes must have been extra shocking back in his day because Darwin didn't have the Discovery Channel to warn him about what he might see. But even now in the age of Shark Week, Mother Nature comes up with scenarios strange enough to give our heebie-jeebies a case of the willies. Here are 10 bizarro animal moments that feel like examples of unnatural selection.