What's thier lifespan? I have some Neon Rosey Barbs that have started to die off. I lost one last week to no apparent reason. I had to take one out of the tank this morning since he was breathing hard and just laying on the bottom of the tank, later he died. None of the other fish in the tank are sick nor are there any marks like the rams got to him. They tend to keep to themselves anyway. The barbs do seem to be loosing some of the color on a few of their scales. I've had these barbs for about 2 years and they were almost full grown when I got them. All of the water parameters are in the same range they have been for the past year.