1. 
   jackknife-fish
   [n] - black-and-white drumfish with an erect elongated dorsal fin
   Found op http://www.webdictionary.co.uk/definition.php?query=jackknife-fish
   
   
2. 
   jackknife-fish
   Equetus lanceolatus noun black-and-white drumfish with an erect elongated dorsal fin
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=jackknife-fish
   
   

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