Actually he isn't i bought a brown ghost knifefish today they were the first i have ever see (he was £4.95 one of my best buys). Here is some info:
Found Throughout guyana, brazil andPeru the brown ghost knifefish or Apteronotus Leptorhynchus grows to 40cm in the wild but 25cm in captivity. Kep the same way as you would keep a blck ghost.
I am trying to find out if i could put him in with my black ghost. If anyone knows if i can please reply.
i see u also have a brown ghost