My family of approximately 50 fishes have been dwindling into just a few big ones and we could guess the reason why. This is the first photographic evidence that they are being hunted and eaten alive!
The black fish was vegetarian when we first bought it. I guess it's appetite grows as it gets older, tubifex worms and dried fish food just isn't enough anymore.
Just wish it didn't eat up my ornamental guppies (see the colourful tail hanging out of it's mouth). Now I have to buy plain silver fishes specifically for feeding.