Upside Down Asian Catfish (Was Told It Was A Black Lancer)

[Gankutsuou]

So at my LFS I was sold a "black lancer" and was told the white line in lancers are geographical as this one has white dots. Extreemly happy to find a rare find as the black lancer, I jumped at it. Turns out he's an even more elusive fish it seems....

then I notice the guy starting to swim upside down while I have him in his bag to get at temperature with the tank. So, right now my only inhabitant of my 125 is my senegal, and in my 38 is a syno flaventatus and a VT angel. Looking at their profile, they are good with not so great water conditions, and I think he'd murder my sno flav so for now he has to go in my sy

Question 1: Will this be too much for a senegal bichir about his own length in size?
Question 2: Will he be compatible with other strong cats like Syno. Angelicus, a nice big pleco like a tiger or blue phantom?

 

[MartinS]

Doesn't sound like a black lancer (Bagrichthys macracanthus) - they are black with a silver line, and I don't believe there are regional variants. As it's swimming upside down - could it be Mystus leucophasis, also known as the Asian upside Down Catfish?
Eithwe way, should be OK with the fish you have suggested, but as always, no guarantees.
HTH
Martin