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jackknife-fish

American  
[jak-nahyf-fish] / ˈdʒækˌnaɪfˌfɪʃ /

noun

Ichthyology.
jackknife-fishes plural
  1. a black and white, American drum, Equetus lanceolatus, found in tropical areas of the Atlantic Ocean, having an elongated dorsal fin that is held erect.


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