Yes, catfish in the Nile river do swim upside down.
A Bagrus Docmac is a nile catfish
Fish, Hippopotamus. There used to be Crocodiles but they go moved down to a dam.
"Upside down" from our current maps. That's why "Lower Egypt" is that area nearest the mouth of the Nile and "Upper Egypt" is that area up river from the mouth of the Nile. Does this answer your question?
Yes, that's were they get there name from.
Catfish aquaculture.
It would seem that the largest fish would be a Nile perch, as I have found no information suggesting that there would be Sturgeon or anything resembling Larger North American fish. Even channel Catfish here seem to get bigger then Catfish in the Nile.
Egypt
Yes. There are a lot of nile crocodiles and even hippos inside!
yes.
Swim, fish, cruise etc
probably not. im not so sure though.....
Swim, wash, drink and boat ride