The species names / identity need verification. The original plates showed the fishes facing right and have been flipped here. Naucratus ductor
Date 1878
Source Francis Day (1878) The Fishes of India. Volume 2.
Author George Henry Ford (1809–1876)
Source: https://commons.wikimedia.org/wiki/File:Naucratus_ductor_Ford_51A.jpg

The pilot fish (Naucrates ductor) is a carnivorous fish of the trevally, or jackfish family, Carangidae. It is widely distributed and lives in warm or tropical open seas. The pilot fish congregates around sharks, rays, and sea turtles, where it eats ectoparasites on, and leftovers around the host species; younger pilot fish are usually associated with jellyfish and drifting seaweeds.