Tinca vulgaris

from The Collaborative International Dictionary of English v.0.48

Tench \Tench\, n. [OF. tenche, F. tanche, L. tinca.] (Zool.)
   A European fresh-water fish ({Tinca tinca}, or {Tinca
   vulgaris}) allied to the carp. It is noted for its tenacity
   of life.
   [1913 Webster]