nine-eyes

Century Dictionary and Cyclopedia

1. n. The river-lamprey, Petromyzon or Ammocætes fluviatilis.
2. n. The butter-fish, Murænoides gunnellus: so called with reference to the presence of nine or more round black ocelli or eye-like spots along the dorsal fin.

Wiktionary

1. n. The lamprey.

GNU Webster's 1913

1. n. (Zoöl.) The lamprey.