The Collaborative International Dictionary of English v.0.48:

Mugilidae \Mugilidae\ prop. n.
   A natural family of fish including the gray mullets.

   Syn: family Mugilidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Mugilidae
    n 1: grey mullets [syn: Mugilidae, family Mugilidae]