9. Giant Oarfish
So far, we’ve seen some little or medium sized hideousness, but here’s a gargantuan one. Not exactly ugly, but just really, really, big. Or in this case, long. The giant oarfish is known as the king of herrings and is known as the world’s longest bony fish, with a ribbon-like appearance. It’s appearance as well as the way it swims often lead to rumors of sea serpent sightings. The giant oarfish inhabits a depth range of 20 to 1000 meters, commonly in tropical to temperate waters. It’s also extremely rare, which adds up to the speculations.