King-of-the-salmon

King-of-the-salmon (Trachipterus altivelis) is a species of ribbonfish in the family Trachipteridae. Its common name comes from the legends of the Makah people west of the Strait of Juan de Fuca, which hold that this fish leads the salmon annually to their spawning grounds. Catching or eating king-of-the-salmon was forbidden, as it was feared killing one would stop the salmon run. This myth is reflected by a former specific epithet used for this fish, rex-salmonorum, rex being Latin for "king". The king-of-the-salmon is found in the eastern Pacific Ocean from Alaska to Chile. It is usually found in the open ocean to a depth of , though adults sometimes feed on the sea bottom.

This species attains a known length of , though larger specimens have been reported. It has an elongated, ribbon-shaped body with a long dorsal fin running along its entire length. The dorsal fin is highest in the front and contains 165–184 soft rays. The pectoral fins are small and rounded, the pelvic fins are greatly reduced, and the anal fin is absent. The dorsal lobe of the caudal fin, containing 7–8 rays, points upward at a 45° angle to the body axis, while the ventral lobe is reduced to 5–6 spines. The eyes are large and the mouth is small but highly protrusible. The fish is silver with crimson-colored fins; the area above the eye is blackish.