Sebastes marinus

from The Collaborative International Dictionary of English v.0.48

Haddock \Had"dock\ (-d[u^]k), n. [OE. hadok, haddok, of unknown
   origin; cf. Ir. codog, Gael. adag, F. hadot.] (Zool.)
   A marine food fish ({Melanogrammus [ae]glefinus}), 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}.
   [1913 Webster]

   {Norway haddock}, a marine edible fish ({Sebastes marinus})
      of Northern Europe and America. See {Rose fish}.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Rosefish \Rose"fish`\, n. (Zool.)
   A large marine scorpaenoid food fish ({Sebastes marinus})
   found on the northern coasts of Europe and America. called
   also {red perch}, {hemdurgan}, {Norway haddok}, and also,
   erroneously, {snapper}, {bream}, and {bergylt}.
   [1913 Webster]

   Note: When full grown it is usually bright rose-red or
         orange-red; the young are usually mottled with red and
         ducky brown.
         [1913 Webster]