> Despite the name, and the leading sentence ("I am on a mission to scan all the ray-finned fishes in the world.") they do not actually intend to scan all the f

> Despite the name, and the leading sentence ("I am on a mission to scan all the ray-finned fishes in the world.") they do not actually intend to scan all the fishes. They settle for merely scanning a single individual from every known ray-finned species. Maybe that's a distinction available between "scan all the fish" and "scan all the fishes" (!). (Where "fish" = "individuals" and "fishes" = "species".)