The Collaborative International Dictionary of English v.0.48:

Sea bream \Sea" bream`\ (Zool.)
   Any one of several species of sparoid fishes, especially the
   common European species (Pagellus centrodontus), the
   Spanish (Pagellus Oweni), and the black sea bream
   (Cantharus lineatus); -- called also old wife.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sea bream
    n 1: flesh of any of various saltwater fishes of the family
         Sparidae or the family Bramidae [syn: bream, sea bream]
    2: any of numerous marine percoid fishes especially (but not
       exclusively) of the family Sparidae [syn: sea bream,
       bream]