I saw haddock on sale at our local grocer. It's really cheap this week. It grew my curiosity.
Are there any similarities between haddock and cod as in flavor?
I often see haddock and cod interchangeably used in the context of fish and chips.
Haddock and Cod are two quite different fish. However, they can be used interchangeably in many fish recipes. So if you want to substitute one for the other you can easily do so. When cooked, many people can't easily tell them apart. Even large food producers and supermarkets get them mixed up.
The main points where they may be treated differently are in long term storage. Haddock is not usually salted where as cod is. Haddock can easily be dried or smoked.