Some pictures of the spawning process of the attenuatus.
Some days ago I added a big shell (almost as big as a fist) to see what will happen. After some digging in the sand and hiding the shell a bit (the way ocellatus does). The attenuatus gave us a big suprise yesterday.
It is the first time that the male didn't eat the eggs from the start. I moved the shell with the female to a smaller tank. So that the fry can be raised by the female. That might be better.
From 1:07 till the end you can see the Synodontis sp. polli white Zambia making some kind of circuit.
First upside down and then they make some kind of looping downwards. They swim above the colony of multifasciatus. And then up again along the side of the tank. They repeat this behaviour every evening.
Sometimes just 1 polli, but most of the time 2 or 3 polli's swim this kind of circuit. It looks like they make a lot of fun this way.
They never swim in the opposite direction. They swim with the current only. The strong current right beneath the surface and the weaker current right above the sand.
It's a shame that your Foai died but the Nasutas are beautiful. I miss mine.
I just found this:
Ophthalmotilapia nasuta "Chimba" and Ophthalmotilapia nasuta "Moliro" These varieties are known as the Tiger Nasuta. Both have dark brown spots all over the body and tail fin. The difference is the Chimba variety has a silvery base with other fins being a light yellow. The Moliro variety has a light yellow base with the other fins being a drab grayish yellow color.