#fishnet__fishing_net  a net that will enclose fish when it is pulled in
  supertype:  #net.trap  a trap made of netting to catch fish or birds or insects
  subtype:  #drift_net__driftnet  a large fishnet supported by floats; it drifts with the current
  subtype:  #gill_net  a flat fishnet suspended vertically in the water to entangle fish by their gills
  subtype:  #landing_net  a bag-shaped fishnet on a long handle to take a captured fish from the water
  subtype:  #seine  a large fishnet that hangs vertically, with floats at the top and weights at the bottom
     subtype:  #purse_seine__purseseine  a seine designed to be set by two boats around a school of fish and then closed at the bottom by means of a line
  subtype:  #trammel_net__trammelnet__trammel  a fishing net with three layers; the outer two are coarse mesh and the loose inner layer is fine mesh
  subtype:  #trawl_net__trawlnet__trawl__dragnet  a conical fishnet dragged through the water at great depths

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