20. Hatchetfish
There are a few different types of Hatchetfish, and this is a big deal to remember as not all of them look the same. There are Marine versions as well as those in deep-sea areas. The most common weirdos are the deep-sea versions, as they can often have nearly ghost-level eyes and teeth that will creep anyone out.
They have creepy teeth and can obviously be intimidating despite their small stature. What makes them creepier than most is their ability to fly..sorta. Hatchetfish jump out of the water a lot, and while they are in the air they can use their fins almost like wings. They don’t fly like birds, but they do get serious air time in their jumps and can even navigate themselves airborne too.