After examination of eyes, skin, and fins, the tail should be cut off to drain the blood away from the gills so that the gill arches can be removed without leaking blood and obscuring the gills under examination.
The tissue between the slits is called the Gill arch, so on each side of the fish there are five Gill Slits and Four Gill Arches.
Airbreathing is accomplished with a labyrinthic organ arising from the gill arches ('labyrinth catfishes'). Some species are capable of travelling short distances on land ('walking catfishes').
 See also: Fish, Species, Water, Pectoral fin, Pectoral Fins
  
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