#ed_op#DIV#ed_cl#I have an Indian Ocean Sailfin Tang that I've had for over 5 years. Over the past week or two I have noticed he hasbeen eating less and less, and he eats almost nothing now. Most of the time he hovers in one are of the tank and spins in slow circles. He bumps into the glass and liverock a lot, which startles him, and that is whyI think he is blind. He can't find food and even if we put it right in front of his face he doesn't eat. Is there something I can do? Does anyone know the lifespan of these fish? and if it is common for old fish to go blind? Should I simply put him out of his misery?#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl#