The Collaborative International Dictionary of English v.0.48:

Saurel \Sau"rel\, n. (Zool.)
   Any carangoid fish of the genus Trachurus, especially
   Trachurus trachurus, or Trachurus saurus, of Europe and
   America, and Trachurus picturatus of California. Called
   also skipjack, and horse mackerel.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scad \Scad\, n. [Gael. & Ir. sgadan a herring.] (Zool.)
   (a) A small carangoid fish (Trachurus saurus) abundant on
       the European coast, and less common on the American. The
       name is applied also to several allied species.
   (b) The goggler; -- called also big-eyed scad. See
       Goggler.
   (c) The friar skate. [Scot.]
   (d) The cigar fish, or round robin.
       [1913 Webster]