The Collaborative International Dictionary of English v.0.48:

clupeid \clupeid\ n.
   any of numerous soft-finned schooling food fishes of the
   family Clupeidae, inhabiting the shallow waters of northern
   seas. The group includes the herrings, menhaden, sardines,
   and shad.

   Syn: herring, clupeid fish.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

clupeid
    n 1: any of numerous soft-finned schooling food fishes of
         shallow waters of northern seas [syn: clupeid fish,
         clupeid]