Cyclops
A common freshwater crustacean.
Some species of Cyclops serve as hosts for parasites such as the guinea worm, the cause of dracunculiasis (guinea worm disease).
The Cyclops were one-eyed giants of Greek mythology, a mythical race of lawless giant shepherds who lived in Sicily.
They had a single large round eye in the center of the forehead.
The word 'cyclops' itself comes from the Greek 'kyklos' (circle) + 'ops' (eye).
Cyclopia is a congenital malformation (birth defect) in which there is only one eye located just above the customary location of the nose.