i have never kept a bubble eyed goldfish but have seen some beautiful pictures of them (see Bristol Aquarists Society) but i saw my first live one today in a shop, it's bubbles were the same size as it's body and it seemed to have been weighed down to the bottom of the tank by them so it couldn't move or swim and was for all intent and purposes stuck premanently upside down. i dont know much about them but surely that's not right?