I can't really give any info but found her like this, this morning. All the rest of the neons and other fish in the aquarium are fine. Did a 50% water change in the main tank after I found and removed her. She still wants to eat as I gave her a little piece of flake to shee and she nibbled on it but while floating like this. Please let me know what you might think this is? Is it neon tetra disease? Or something else? Please help. Thanks.