i had a couple ghost catfish or otherwise known as glass catfish. i came home and the one was lying upside down bent in a c shape, he/she was still breathing and struggling to move, it looked like it was really suffering, it was dead the next morning. does anyone know what happened to cause this? the other ghost catfish and all the other fish are fine. i also have neon tetras, i read that the neons can carry a disease called neon tetra disease which can be transferred to others, could it be this?