Eu tenho ouvido freqüentemente que alguns restaurantes usam pollock do Atlântico para peixe e batatas fritas. Sua pergunta despertou meu interesse e decidi olhar em volta um pouco.
In Britain and Ireland, cod and haddock appear most commonly as the fish used for fish and chips, but vendors also sell many other kinds of fish, especially other white fish, such as pollock or coley, plaice, skate, and ray (particularly popular in Ireland); and huss or rock salmon (a term covering several species of dogfish and similar fish).
In the United States, the type of fish used depends on availability in a given region. Some common types are cod, halibut, flounder, tilapia or, in New England, Atlantic cod or haddock. Salmon is growing common on the West Coast, while freshwater catfish is most frequently used in the Southeast. In Canada, pollock, haddock, and halibut are popular choices, alongside cod.
De acordo com minha experiência, pollock e alabote (respectivamente) estariam mais próximos do sabor do bacalhau e arinca do que de alguns dos outros.