Sharks getting creepier the deeper you go is more of a perception than a scientific fact.
In the deep ocean, there are many species of sharks that are adapted to life in the dark and under high pressure, and some of these species can be quite different from the more familiar species that are commonly seen near the surface.
Some of these deep-sea sharks have large, glowing eyes, jagged teeth, and long, slender bodies, which can create a creepy appearance for some people.
Additionally, the deep ocean is still a largely unknown environment, and there is often a sense of fear and unease when we think about the creatures that might be lurking in the depths.