10) Toothed Seadevil/Needlebeard or Netbeard Seadevil
Source: Imgur
The female seadevil is streamlined and deadly. Her narrow, longer structure allows her to move rapidly and her teeth are terrifying even by anglerfish standards. The chaotic mass of jangled fangs, both inside and out of her mouth, can likely be individually moved to guide unwitting prey deeper into her maw. During the mating process, the male will sink his teeth into her and remain there until their skin combines and his body decays.