I've kept the heterodonta; was my first Featherfin. mine looked exactly like the pic supplied by Philippe, only a fair bit darker, almost black body. but since they were generation 'X' (species hasn't been imported for many years) there was no way of telling wich generation or the type locality.
but from the 7 I eventually got hold of, 5 turned out to be males; it didn't become a succes story. I lost a few to diseases (wrong food, wrong companions) and the reminding males decided to jump the tank.
once I had them spawning, but back then I only had 1 tank, so you can imagine what happened to the fry.
After that I tried ventralis, blew em up with BLOAT (nobody told me they were almost as fragile as Tropheus, back then) and hence ditched the idea of keeping featherfins for years.
Dhonti, I completely forgot to tell you last night, but you should put a few slanted pieces of slate or flagstone in the tank.
in a bare tank the heterodonta makes a little pit, but supplied with a wall of rock it does what it's supposed to do; build a half moon (crescent) shaped crater against a rock. for reasons unknown to me they do not build such a pit against a window, at least they didn't here. not even the back panels. they like rocks.
these craters are deep with a steep wall.
It's also fun to mix a few gravel in with the sand and ditch it in the crater; the male will carefully sieve the sand and collect all the gravel to put it outside, he only wants the finest sand in the pit.
you can keep them fairly busy this way.
"And he piled upon the whale's white hump the sum of all the rage and hate felt by his whole race. If his chest had been a cannon, he would have shot his heart upon it"