What Is A Cryptid, Really?

For skeptics, the idea of cryptozoology is paranormal bunk that has more to do with looking for mythical monsters than real science. In 2004, Chad Arment’s cryptozoology textbook outlined the four different types of cryptids that should be under investigation: animals outside their usual geographic range, individuals within a species that have some extraordinary characteristic, creatures that look like a species declared extinct, and creatures that are completely unlike anything accepted by science. This is an attempt to make cryptozoology a little more accepted in the scientific community and to get rid of the idea of other types of cryptids, like those whose existence is passed down in folklore and myth.  

Source: KnowledgeNuts