This is not a fair thread because its too wide open to too many species. A snakehead will destroy any cichlid or most other fish. A GATF well nuff said. You need to break it down by species or size. The giant snakehead is hands down a bad mofo. No other fish except sharks caused more of a riot than the snakehead in many countries. Most fish kill to eat but the snakehead kills because thats what it was created to do and it can back up its attitude and name.