Humans are generally too large to feel their zing, but sea anemones harbor stinging cells that remind other marine life to keep a wide berth. This video by Ahmet Karabulut of the Stowers Institute for Medical Research in Kansas uses confocal microscopy, fluorescence, and image stacking to show the movement of the anemone’s neurons (purple) and stinging cells (green). It took third place in this year’s Nikon Small World in Motion competition.