There is something very similar to this on the Betta board but I wasn't too worried about it until well today. Post your memorial of your little invert buddy who has passed on recently or in the past..
I was doing a water change today when i noticed that Kappa (my bamboo shrimp) came floating out without a fight usually he would fight the current give up and run the other side of the tank. Today as i poured the new water into the tank I noticed that he was just kinda sitting there and was bobbing up and down in the current created by the bucket. I also noticed that he had red lines in his shell where the semi hinges were when I stuck my hand in the tank he always liked to crawl on the back and eat some 'rare' bacteria (well atleast to him) when i put my hand in there i didn't even move so i grabbed him with the net and noticed i didn't even get a fight as I watched more and more I noticed that he looked like something that would be served at Red Lobster so he died how I don't know but from the redness on him I'm guess it was hot water but the water I added wasn't that hot the temp didn't raise at all so it was about the same temp its around 78 F so idk i will probly get another one when i move over to my new dorm room but if it was some kind of parasite or disease let me know i want to take care of it before i get another
Brent