Nobody “invented” cod, because cod is a type of fish that evolved in nature, not a human-made product. The word “cod” usually refers to species in the genus Gadus , especially the Atlantic cod (Gadus morhua).

What cod actually is

  • Cod is a demersal fish (living near the sea bottom) in the family Gadidae, commonly found in cold northern oceans.
  • The best-known species are Atlantic cod (Gadus morhua) in the North Atlantic and Pacific cod (Gadus macrocephalus) in the North Pacific.

Where “invention” does appear

If the question is about something named “COD” rather than the fish:

  • Call of Duty (CoD) is a video game series first released in 2003 by Infinity Ward and published by Activision; it was created by a team at Infinity Ward, co‑founded by developers including Vince Zampella.
  • There is also a small experimental programming language called COD , created as a class project by Troy Wu, Aidan Esposito, and Khalid Stewart, unrelated to the fish or the game.

In everyday use, though, “cod” the fish has no single inventor; it is a naturally occurring marine species that humans have fished and traded for over a thousand years.