I'm interested in getting a few of these fish. Anyone know what I'm talking about? lol. I'm not even sure if I'm in the right area to be asking this question. They almost look like butterflys but can look like catfish as well. They jus sit on top of your tank all day. And there really awesome looking. Are they hardy? Do they live long.? I have a 125 gallon tank with Semi aggressive fish. Thanks.