Cryptozoology is the search for or the study of animals/creatures that do not have enough evidence for the scientific community to acknowledge their existence. Examples include the Loch Ness Monster, Bigfoot, and Black Panther in North America. Eye witness accounts are often numerous, but without a carcass, DNA sample, video, photographs, skeleton, or other hard evidence as required by they simply do not acknowledge the existence of such a creature.
“In cryptozoology and sometimes in cryptobotany, both pseudoscience, a cryptid is an animal or plant whose existence has been suggested but has not been discovered or documented by the scientific community. Cryptids often appear in folklore and mythology, leading to stories and unfounded belief about their existence.” – en.wikipedia.org/wiki/Cryptid