Thank you all for some quick responses but I spent the morning looking at The world of catfishes by Midori Kobayagawa and found some pictures of a juvenile that looked right Heptapteridae :: Rhamdia quelen or Heptapteridae :: Rhamdia cf. guairensis

http://www.planetcatfish.com/cotm/2005_03.php
I ...

I can't find this fish in any book or this website :? {I would need to know its latin name}. Does any one out there in catfish land know its proper name or any other info? All I know is it comes from some where in south america and can grow to several feet in length :shock: {this one is currently 6 ...