I added 2 black ghost knife fish to my tank. I know they are classified as carnivorous. I have been feeding them frozen bloodworms with a turkey baster & they love eating them. Yesterday l put squash and zucchini in the tank for the Gouramis and the Bala sharks. It wasn't too long later that the black ghost knifes have run the other fish off and are eating it. Now they are all sharing it and eating together. It's quite an amazing site. But l thought the black ghost knives were just meat eaters ??