Haddock vs. Halibut

Haddock and Halibut Definitions
Haddock
A food fish (Melanogrammus aeglefinus) of northern Atlantic waters, closely related to and resembling the cod, but having a dark spot above each pectoral fin.
Halibut
Any of several large edible flatfishes of the genus Hippoglossus and related genera, of northern Atlantic or Pacific waters.
Haddock
A marine fish, Melanogrammus aeglefinus, of the North Atlantic, important as a food fish.
Halibut
A large flatfish of the genus Hippoglossus, which sometimes leaves the ocean floor and swims vertically.
Haddock
A marine food fish (Melanogrammus æglefinus), allied to the cod, inhabiting the northern coasts of Europe and America. It has a dark lateral line and a black spot on each side of the body, just back of the gills. Galled also haddie, and dickie.
Halibut
A large, northern, marine flatfish (Hippoglossus vulgaris), of the family Pleuronectidæ. It often grows very large, weighing more than three hundred pounds. It is an important food fish.
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Haddock
Lean white flesh of fish similar to but smaller than cod; usually baked or poached or as fillets sauteed or fried
Halibut
Lean flesh of very large flatfish of Atlantic or Pacific
Haddock
Important food fish on both sides of the Atlantic; related to cod but usually smaller
Halibut
Marine food fish of the northern Atlantic or northern Pacific; the largest flatfish and one of the largest teleost fishes