oarfish

Any of several marine fishes of the family Regalecidae, especially Regalecus glesne, having a slender silvery body up to 11 meters (36 feet) in length, a crimson dorsal fin along its entire length, and long thin pelvic fins.

A trachypteroid or tæniosomous fish, Regalecus glesne, of the family Regalecidæ, a kind of ribbon-fish. It attains a length of from 12 to more than 20 feet.

The ribbon fish.

A large, greatly elongated, type of fish of the family Regalecidae.

thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin