The Fearsome Black Seadevil
This female anglerfish sports a disproportionately large head dominated by a cavernous mouth lined with fang-like teeth. Her tiny males permanently attach to her body, losing their eyes, fins, and most internal organs to become nothing more than sperm-producing parasites. She uses her bioluminescent lure to attract prey in the pitch-black waters, where her coal-black skin renders her practically invisible.