The Rope Fish or Reed Fish, Erpetoichthys calabaricus is a member of a group of very primitive fish called the Polypterids. They are all from rivers, lakes and swamps of the African continent. They can reach lengths of up to 36 inches (3 feet) and, when fully grown, require a pretty good-sized aquarium. They are generally peaceful fish, though they are not to be trusted around fish that they can swallow and they will sometimes get into combats with each other that can result in substantial injury.
They'll eat pretty much any 'meaty' foods and do well on frozen beef heart and bloodworms as well as sinking pellets (not the algae type). Smaller fish may disappear from your tank, especially overnight, when the Rope Fish is in there. Any openings in your tank should be carefully blocked because E. calamoichthys is a great escape artist and seems to be able to find its way through relatively small holes. They are not terribly sensitive as to pH but prefer conditions between 7.0 to 7.5. They like to have places to hide and a nice piece of driftwood and lots of plants will be appreciated.