Minecraft wiki entry for Raw_Cod, associated text: Guardians and elder guardians also drop a 2.5% chance to drop a random fish, with 60% of them being raw cod. The chance of getting the fish drop is increased by 1% per level with Looting (for a maximum of 5.5% with Looting III), but the type of fish is not affected. Non-cod fish does not drop as cooked if the guardian or elder guardian was on fire.