The same thing with me, I hate it when I loose a new or favorite fish, but watching other things try to eat them like crabs or something is just amazing.
I watched my 2" marble cat grab my 2.5"leichardti aro and swallow it till just the tail was sticking out. I never thought it would have been possible, I hit the cat with the net and it puked up the aro. It was dead. Sh*t!!!!!!!!!!!!!!!! Don't ever trust a catfish. Then I put the marble cat in the 300 with the big guys to see how he liked it!
are they separated now? its just a matter of time lol. my moray got a hold of my unsuspecting fire eel. they've been in the same tank for more than a year, then WHAM! byebye fire eel.