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BY: Dylan Steinhaus
  Computer literacy
     4/12/12
   Better known as the Black Ghost Knife-
    fish.
   It is native to South America in the Amazon
    basin.
   They like to live in fast moving sandy
    water in tropic like climates.
   They can be found in the Paraná River but
    mainly in the Amazon River
   South American natives believe that the
    ghosts of the dead are resurrected in
    these fish giving it the name Black Ghost
   Recent discovery shows like than of an
    electric eel the knife fish has an
    electrical field.
   Unlike a eel it does not use it to Paralyze
    its prey.
   It uses its electrical sense to
    communicate, navigate, and hunt.
   Since they are a nocturnal fish there
    electric field tells them what's around so
    they don’t get killed
   There electric field is produced by a
    small organ in its tail and small
    receptors along the body
   Knife-Fish are a weakly electric fish but
    needs the electric field to do simple daily
    tasks.
   It allows the fish to know what is happening
    360 degrees around its’ self so it can escape a
    threat.
   as well as protecting its’ self it also lets the
    fish know if it has prey near by.
   It also uses this sense to communicate with
    other knife-fish.
   And being a nocturnal fish it also uses this
    sense to navigate around in the dark murky
    water.
The fish is all black except
for two white rings on its
tail, and a white blaze on its
nose, and rarely extend into
a stripe down its back. It
moves mainly by a long fin on
its stomach. It does not have
scales.
               Black Ghost Knife-fish

                 
Credits
http://en.wikipedia.org/wiki/Black_ghost_knifefish
http://upload.wikimedia.org/wikipedia/commons/4/43/Black_Ghost_
Knifefish_400.jpg
http://www.pbs.org/newshour/rundown/2012/04/electric-field-gives-
knifefish-a-sixth-sense.html
http://www.google.com/imgres?q=black+ghost+knife+fish&start=222&h
l=en&safe=strict&biw=1280&bih=929&gbv=2&tbm=isch&tbnid=xCIdHEA
v0k5KXM:&imgrefurl=http://www.fishtanksandponds.co.uk/profiles/ap
teronotus-
albifrons.html&docid=cVs4ejTHxCS4wM&imgurl=http://www.fishtanks
andponds.co.uk/images/fish/img16.jpg&w=800&h=600&ei=H9CGT_KE
OaOr8AH24d2gCA&zoom=1&iact=hc&vpx=800&vpy=596&dur=1060&ho
vh=194&hovw=259&tx=96&ty=136&sig=100150322897777381913&page=8
&tbnh=133&tbnw=193&ndsp=33&ved=1t:429,r:20,s:222,i:121

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Knife fish