argus

1. a large long-tailed pheasant with generally brown plumage, found in SE Asia and Indonesia.
2. a small brown or bluish Eurasian butterfly which has eye-like markings near the wing margins.
3. a silvery deep-bodied fish with round spots, found throughout the tropical Indo-Pacific region in both fresh and salt water.

late Middle English: from Latin, from Greek Argos, the name of a watchman in Greek mythology who had a hundred eyes. After he was killed by Hermes, Hera used his eyes to decorate the peacock's tail.