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: a fish that lives in the Atlantic Ocean and that is often eaten as food
Full Definition of HADDOCK
: an important food fish (Melanogrammus aeglefinus syn. Gadus aeglefinus) of the cod family occurring on both sides of the North Atlantic that has a black lateral line and dark patch above the pectoral fin
Haddock (Melanogrammus aeglefinus)—Painting by Jean Helmer
Valuable North American food fish (Melanogrammus aeglefinus, family Gadidae). A bottom-dweller that feeds on invertebrates and fishes, it resembles the cod, with its chin barbel (fleshy feeler) and two anal and three dorsal fins, but is distinguished by a dark (rather than light) lateral line and a distinctive dark spot on each shoulder. It is gray or brownish above, paler below. It grows to about 3 ft (90 cm) long and 25 lbs (11 kg).