Perch pest

from The Collaborative International Dictionary of English v.0.48
perch \perch\ (p[~e]rch), n. [Written also {pearch}.] [OE.
   perche, F. perche, L. perca, fr. Gr. pe`rkh; cf. perkno`s
   dark-colored, Skr. p[.r][,c]ni spotted, speckled, and E.
   freckle.] (Zool.)
   1. Any fresh-water fish of the genus {Perca} and of several
      other allied genera of the family {Percid[ae]}, as the
      common American or yellow perch ({Perca flavescens} syn.
      {Perca Americana}), and the European perch ({Perca
      fluviatilis}).
      [1913 Webster]

   2. Any one of numerous species of spiny-finned fishes
      belonging to the {Percid[ae]}, {Serranid[ae]}, and related
      families, and resembling, more or less, the true perches.
      [1913 Webster]

   {Black perch}.
      (a) The black bass.
      (b) The flasher.
      (c) The sea bass.

   {Blue perch}, the cunner.

   {Gray perch}, the fresh-water drum.

   {Red perch}, the rosefish.

   {Red-bellied perch}, the long-eared pondfish.

   {Perch pest}, a small crustacean, parasitic in the mouth of
      the perch.

   {Silver perch}, the yellowtail.

   {Stone perch}, or {Striped perch}, the pope.

   {White perch}, the {Roccus Americanus}, or {Morone
      Americanus}, a small silvery serranoid market fish of the
      Atlantic coast.
      [1913 Webster]
    

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