Our guy Rock N Roll I have noticed recently sometimes floats with his body curved into kind of a S shape when at rest. I tried to take a pic which I know would be helpful but of course he straightens out every time I try. Also sometimes when he swims his tail flops over to the side, kind if like it is too heavy to hold up or something, but this does not always happen. Since our other betta's recent death I am paranoid about possible signs of illness. Do these things sound normal or should I be concerned about the little guy? We have had him for about 2 months but I have no idea of his actual age.