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see codcod,
member of the large family Gadidae, comprising commercially important food fishes. The family, whose members are found in the N Atlantic and Pacific, includes the tomcods, the haddock, and the pollacks (or pollocks).
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(Melanogrammus aeglefinus), a fish of the family Gadidae. Haddock reach a length of 70 cm and a weight of 3 kg. The fish are dark above and have a silver abdomen and silver sides. There is a black spot on each side above the pectoral fin. The mouth is inferior.

Haddock are found in the boreal regions of the Atlantic Ocean. They are numerous in the North Sea (near Iceland), in the southern part of the Barents Sea, and off Grand Bank, Newfoundland. The fish deposit pelagic roe. The fry live in deep waters, often finding shelter under the bell of jellyfish. Adult forms live close to the bottom and feed on benthos and the roe of herring and capelin.

In the North Sea, haddock reach sexual maturity in two or three years; in the Barents Sea, sexual maturity is attained after five to seven years. The migration of haddock is particularly of note in the Barents Sea: the young fish are carried by northern cape currents away from the northern coast of Norway; after reaching sexual maturity, the fish travel to the Lofoten Islands for spawning.

Haddock are commercially valuable fish.


(vertebrate zoology)
Melanogrammus aeglefinus. A fish of the family Gadidae characterized by a black lateral line and a dark spot behind the gills.


a North Atlantic gadoid food fish, Melanogrammus aeglefinus: similar to but smaller than the cod
References in periodicals archive ?
PRIZE CATCH: Darren Makepeace with melanogrammus aeglefinus.
Effect of the incorporation level of herring meal into test diet on apparent digestibility coefficients for protein and energy by juvenile haddock, Melanogrammus aeglefinus L.
The plerocercus of Grillotia erinaceus as a biological tag for haddock Melanogrammus aeglefinus in the North Sea and north-east Atlantic.
Stock identification of haddock Melanogrammus aeglefinus on Georges Bank based on otolith shape analysis.
In general, they demonstrated that, as sweep length (distance between trawl doors and net) was increased, catch rates of Atlantic cod, Gadus morhua, and haddock, Melanogrammus aeglefinus, increased with increasing fish length.
Hislop (1984) summarized fecundity data for four gadoid species from the North Sea and estimated FGB for cod, Gadus morhua, and haddock, Melanogrammus aeglefinus, at 475 and 550, respectively.
Maturation, spawning and fecundity of the North Sea haddock, Melanogrammus aeglefinus.
Anatomy of an apparent year-class failure: the early life history of the 1983 Browns Bank Haddock Melanogrammus aeglefinus.
In combination with declining availability of some important traditional groundfish products (including high valued Atlantic cod Gadus morhua, and haddock, Melanogrammus aeglefinus, fillets), lower valued block and minced block made from pollock, hakes, and any number of other relatively abundant species, and growing worldwide demand for whitefish products (including fresh and frozen fillets, blocks, headed and gutted, and surimi), prospects for groundfish development appear bright, if as of now somewhat uncertain.