Other cod-like fish come from the same family (Gadidae) that cod belong to, such as haddock, pollock, and whiting.
In the United Kingdom, Atlantic cod is one of the most common ingredients in fish and chips, along with haddock and plaice.
[citation needed] According to the laws of kashrut, cod is considered kosher because it is a fish with both fins and scales.
[1] Haddock is a very popular food fish, sold fresh, smoked, frozen, dried, and, to a small extent, canned.
[4] Grimsby fish market sources its haddock from the North East Atlantic, principally Iceland, Norway and Faroe.
Traditionally a popular source of food in some countries, such as Norway, in the United Kingdom it has previously been largely consumed as a cheaper and versatile alternative to cod and haddock.
Year-old fish are traditionally split, salted and dried over a peat hearth in Orkney, where their texture becomes wooden and somewhat phosphorescent.
In 2009, U.K. supermarket Sainsbury's renamed pollock 'Colin' in a bid to boost ecofriendly sales of the fish as an alternative to cod.
[9] The supermarket also suggested some shoppers may be too embarrassed to ask for the species under its proper title, due to its reputation as an inferior fish, and its similarity to a popular English swear word (bollocks).