4. Viperfish

And onto another deep-sea ugly. The fangtooth may have a huge set of choppers among a lot of deep-sea creatures, the viperfish has got small-needle-like set of teeth out of its mouth. They lurk between 250 to 5,000 feet beneath the sea, but have been known to stay in shallower parts during the night time, in the tropical and temperate waters. They are said to lure their meals in with the use of their light-producing organs called photophores, similar to what the anglerfish has. Like many deep-sea fish, this one can go for a long time without eating, so you can imagine the ferocity it has when it goes out to get some food.