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]