Cooked Freshwater Fish

Something fishy about this.
Overview
Cooked Freshwater Fish is a food item made by cooking any caught freshwater fish on a 

Cooking takes 12 seconds per fillet on a Campfire and 6 seconds per fillet on a BBQ. Using a BBQ is therefore twice as fast as using a Campfire for the same fish. Because output scales with fish value, it is worth checking which freshwater fish are the most profitable to cook before turning a catch into fillets.
Official description
Something fishy about this.