Leuciscus alburnus

from The Collaborative International Dictionary of English v.0.48

Ablet \Ab"let\, Ablen \Ab"len\[F. ablet, ablette, a dim. fr. LL.
   abula, for albula, dim. of albus white. Cf. {Abele}.] (Zool.)
   A small fresh-water fish ({Leuciscus alburnus}); the bleak.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Bleak \Bleak\, n. [From {Bleak}, a., cf. {Blay}.] (Zool.)
   A small European river fish ({Leuciscus alburnus}), of the
   family Cyprinid[ae]; the blay. [Written also {blick}.]
   [1913 Webster]

   Note: The silvery pigment lining the scales of the bleak is
         used in the manufacture of artificial pearls. --Baird.
         [1913 Webster]