Crossword Genius

North Atlantic fish (7)

Ross

I think it could be either:

halibut

haddock

(Other definitions for halibut that I've seen before include "Large flatfish, tasty to eat" , "Large flatfish used as food" , "Large food fish" , "Fish found in Bali hut" , "Fishy sort" .)

I've seen this clue in the Penny Press.
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