Haddock | Facts, Diet, Habitat & Pictures

Haddock | Facts, Diet, Habitat & Pictures

Haddock Overview


Haddock, a cold-water fish species, possesses a distinctive appearance with a sleek, elongated body featuring a pronounced lateral line running along its silvery sides. Its skin showcases a mottled pattern of dark blotches and lighter areas, blending with the seafloor for camouflage.

A prominent dorsal fin, sharp snout, and a small, slightly downturned mouth characterize its facial features. The tail fin is squared, contributing to its agile swimming capabilities.

Origins And Evolution

Haddock, an evolutionarily ancient species, traces its origins to the North Atlantic, with fossil evidence suggesting its existence dating back to the Cretaceous period. This fish belongs to the family Gadidae, a diverse group of cod-like fishes.

Over millennia, haddock underwent adaptive changes in response to the frigid North Atlantic waters, resulting in its distinct physical features, including a streamlined body for efficient swimming.

Evolution favored traits such as a downturned mouth and well-developed sensory organs to locate prey in deep, dark waters. Haddock's ability to migrate across varying depths contributed to its widespread distribution in the North Atlantic and adjacent seas.

Its evolutionary journey reflects successful adaptations to harsh marine environments, making haddock a resilient and ecologically significant species in the region's ecosystems.

Behavior and Lifestyle

It exhibits a primarily solitary and demersal (bottom-dwelling) lifestyle, often found on sandy or gravelly seabeds at depths ranging from 40 to 200 meters. They are known for their cautious and opportunistic feeding behavior, preying on small fish, crustaceans, and various bottom-dwelling organisms.

Haddocks are crepuscular, meaning they are most active during dawn and dusk, hunting for food under low light conditions. They tend to migrate seasonally, moving to shallower waters in the summer and returning to deeper regions during the colder months.

Scientific Classification

  • Kingdom: Animalia (Animals)
  • Phylum: Chordata (Chordates)
  • Subphylum: Vertebrata (Vertebrates)
  • Class: Actinopterygii (Ray-finned Fishes)
  • Order: Gadiformes (Cods, Haddocks, and Pollocks)
  • Family: Gadidae (Codfishes)
  • Genus: Melanogrammus
  • Species: Melanogrammus aeglefinus (Haddock)


  • North Atlantic Ocean
  • Arctic Ocean
  • Barents Sea
  • Baltic Sea
  • Gulf of Maine
  • North Sea
  • Iceland
  • Faroe Islands
  • Norwegian Sea
  • Western Atlantic Ocean

Fast Facts

  • Name: Haddock Fish
  • Scientific Name: Melanogrammus aeglefinus
  • Habitat: Cold Waters
  • Diet: Small Fish
  • Physical Features: Silver Sides
  • Nocturnal: Active Nightly
  • Solitary: Ocean Dweller
  • Unique Order: Gadiform Fish
  • Lifespan: 10-15 years
  • Conservation Status: Least Concern
  • Fun Facts: Distinctive Dark Markings

Physical Characteristics

  • Color: Silver Gray
  • Skin Type: Smooth Scales
  • Top Speed: Swift Swimmer
  • Lifespan: 10-15 Years
  • Weight: Moderate Size
  • Length: Up to 3 ft
  • Age of Sexual Maturity: 3 Years
  • Age of Weaning: Larval Stage

Haddock FAQs

What is haddock?

It is a species of fish found in the North Atlantic Ocean known for its mild-flavored white flesh.

How do you distinguish haddock from other fish?

Haddock can be recognized by its distinctive dark lateral line and a dark blotch or "thumbprint" on each side.

Where is haddock commonly found?

It is primarily found in the North Atlantic Ocean, including areas like the North Sea, the Gulf of Maine, and the Barents Sea.

What do haddock eat?

Haddocks are carnivorous and feed on small fish, crustaceans, and bottom-dwelling organisms.

Is haddock a popular seafood choice?

Yes, it is a popular seafood choice, particularly in dishes like fish and chips.

How big do haddock typically get?

Haddocks usually measure between 18 to 24 inches (45 to 60 centimeters) in length and weigh 2 to 5 pounds (0.9 to 2.3 kilograms).

Are haddock solitary fish?

Haddocks tend to be solitary or found in small groups, unlike some other schooling fish species.

Rate this post

Leave a Reply

Your email address will not be published. Required fields are marked *