From what I’ve learned in my college Biology classes, Cyclops species of animals, like fishes and humans, were still of ancient times. However, lately, in Mexico, a Cyclops Shark was found in one of their gulfs.
Cyclops, in Greek, means having a single or one eye. In humans, if a man having such, belongs to a certain race of people, the giants. That happened in the ancient times. But today, with this cyclops shark, it is merely a congenital abnormality, according to the Biologist who studied the cyclops shark found in Mexico.