Catfish Attack Livebearers?

NEM

Small Fish
Aug 18, 2005
23
0
0
#1
In the last couple of days, a molly and guppy in my tank look like they had their tails attacked. The molly has what appears to be a fracture on the bottom of it's tail. The guppy looks like it had a huge bite taken out of its tail.

Question: Do Cory Catfish ever attack other fish in this way? The rest of the fish seem to be pretty peaceful. I'm thinking maybe the catfish do this in the dark.

I have no clue.
 

CAPSLOCK

Elite Fish
Jul 19, 2004
3,682
33
48
36
Cape Cod
#5
Some catfish will eat other fish (whole), but not cories. Cories are ridiculously peaceful.

Are you sure it's a bite out of the fin, and not a water quality / tail rot issue?