The Collaborative International Dictionary of English v.0.48:

Clupeidae \Clupeidae\ n.
   a natural family of teleostean marine fishes which includes
   the herrings, shad, sardines, menhaden, and others.

   Syn: family Clupeidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Clupeidae
    n 1: herrings; shad; sardines; etc. [syn: Clupeidae, family
         Clupeidae]