One of the biggest mysteries in the world Cryptozoology is a half-human half fish called Mermaid or a mermaid. Because of its strange character, this creature is then more often associated with mysticism than science.
Mermaid is a term given to aquatic creatures that have bodies from the waist up like women while the waist down is like a fish. Even though we have only heard of this creature from a collection of tales, the existence of this creature can be traced in the literature up to 2,000 years ago.