The hipster toad's weaponized mustache

Scientific American has the top ten weird animal stories of 2013, including this amphibious tale:

For Emei moustache toads, a top-quality moustache is an essential, and violent, weapon … During the breeding season, each male grows 10 to 16 spines. "They are as sharp as a pencil lead" says Cameron Hudson of the University of Guelph in Ontario, Canada, adding that the frogs "do try to stab you a bit when you pick them up". The males fought underwater, head-butting each other in the belly to drive their spines into the other toad's flesh. "I've never seen any of them kill each other," says Hudson. "But they get a lot of puncture wounds."

Watch the video below, then see the rest of the top ten here.