Leech (Enemy)

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While leeches primarily live in water, they will often take to dry land to hunt, using their leaf-like appendages to lure herbivores which they will then latch onto with their suction-like mouths and drain of blood until they are full to bursting—a process which, depending on the size of the animal, can result in death. While it has long been believed that leeches are blind, due to a distinct lack of eyes, closer inspection will reveal that the amphibious creatures are equipped with countless tiny eyespots which, while not allowing for sight in the normal sense, grant the creatures the ability to detect light.

— Encyclopædia Eorzea vol 1, page 283