Difficult Catfish ID?

[OTp1144]

So I swung by a lfs today and saw a catfish for $80 at ~6". Of course I forgot to take a picture, but it was all black with white lyres on the dorsal and tail fins. It was definitely a kind of shovelnose of some kind. They called it a swallowtail or sinnowtail catfish or something like that. I cant remember.

Anyone have any idea of what it might be?

 

[OTp1144]

Doing some research, I think it was a Brachyplatystoma platynemum. Anyone know anything about them?

 

[Chicxulub]

Thread closed due to a more concise thread being created by the OP later.

PS- the common name is slobbering catfish.