Girobokku (ギルボック) is the Japanese name for an otherwise unnamed floating eye enemy from The Adventure of Link.
These enemies greatly resemble Moas in being giant floating eyeballs; however, they fight rather differently, traveling around the screen for a short distance before opening their single great eye, which is Link's only opening to attack. Another difference is that Girobokku are always visible, whereas some Moas usually require the Cross to be visible.
Due to their similar appearances, Girobokku may somehow be related to the Patra or Digdogger.
