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Re: NFC: mystery gobie

 <A HREF="http://www.great-lakes.net/envt/exotic/goby.html">Goby in the Great
Lakes</A>   < link to website info

The goby, Neogobius melanostomus, is a bottom dwelling fish with a large head,
resembling a 
tadpole, which can grow to be 250 mm (10 inches).  First discovered in Lake
St. Clair in 1990, 
presumably introduced via ballast water from transoceanic vessels, the round
goby and the 
tubenose goby have spread to lakes Erie, Michigan and Superior and to many
rivers including the 
Mississippi watershed.  Round gobies are thriving in the Great Lakes Basin
because they are 
aggressive, voracious feeders which can forage in total darkness.  The round
goby takes over 
prime spawning sites traditionally used by native species, competing with
native fish for habitat 
and changing the balance of the ecosystem.
SOURCE:  ́Round Gobies Invade North Americaî 1995.  Great Lakes Sea Grant