Curious as to who keeps butterfly fish, what species and how they do. I purchased a Merten's BF last week. He shares my 55 with a firefish and a yellow headed jawfish. Very beautiful, eating everything and seems to be doing quite well. I've held off getting one until I felt I had the ability and environment to succesfully maintain it. I know that many of them are quite fragile, and wondered what your experiences are/have been. TIA.