Hey, happy husband since you got a new fish tank and all!
I'm sorry her fish were cannibals, though. LOL. I knew a guy in college who had several fish tanks and he fed the big fish feeder fish; he did it once when we were all over playing tabletop games and it was like the death nature show. One fish had a tail sticking out of its mouth for the rest of the night.
Yes, very happy husband! It took us until their death to learn they were cannibals, it was pretty funny because she was the one who realized it.
Sounds like your friends may have had Oscars. They are pretty cool and will eat hot dogs as well as live fish.