The Collaborative International Dictionary of English v.0.48:

Mulloid \Mul"loid\ (m[u^]l"loid), a. [NL. Mullus, generic name
   (fr. L. mullus surmullet) + -oid.] (Zool.)
   Like or pertaining to the genus Mullus, which includes the
   surmullet, or red mullet.
   [1913 Webster]