I have 3 fancy twin tailed goldfish that do not like me. For some reason they are always so scared. I have some fake plants to one side of their tank and any time I come anywhere near their tank they quickly hide. I thought goldfish were supposed to be interactive and not really care about humans. They will not even come out when I offer food. I have seen them a few times at night from a distance when they were sleeping so I know they are alive. I just want to see and enjoy my goldfish, what am I doing wrong?