You got it Wayne!
It is the R. vulpinis and is also called a dogfish, Biara, or Chanbiara, it is supposed to only reach 28", the picture is by William Fink.
Post one up.
I found your photo as well as this one on www.malawicichlids.com
They are by M.K.Oliver.
they are the Malawi Spiny Eel, (Aethiomastacembelus shiranus)
I will find a picture.