sea lamprey

from WordNet (r) 3.0 (2006)

sea lamprey
    n 1: large anadromous lamprey sometimes used as food;
         destructive of native fish fauna in the Great Lakes [syn:
         {sea lamprey}, {Petromyzon marinus}]

from The Collaborative International Dictionary of English v.0.48

Sea lamprey \Sea" lam"prey\ (Zool.)
   The common lamprey.
   [1913 Webster]

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