I have 2 SAE or FSAE's I am not too sure what they are, they look like SAE's but could be the false one, my question is can these fish become killers? they have herded all my fish to one side of the tank and stay at a an odd "head standing" angle, they swim normally when they move about the tank looking for fish that might have escaped the blockade, I've lost my largest clown loach and all but 3 of my gourami and my biggest Raphiel (of about 7 inches) I am at a loss of what to do, they really have not contributed to much in the line of the tank except destroy all my plants, can these fish kill other fish for no reason 
