Cat Fish

[Melvin]

Hello all, and let me wish everyone a great summer!!!!! My question is this.....I have this cat fish in my 55 gallon tank....unfortunately, I don't know his type, but he is a good 7 inches long. I discovered this morning when I awoke, about 8 AM that he had one of my cory cats in his mouth. The only thing visible was the tail fin of this little cory. As I am writing this post, it is roughly 6 PM and the cat fish is still munching on this cory. The tail of the cory is in the same position as it was at 8 AM. Does it take this long for the cat fish to devour this poor little thing?????