Can you give us some more info on it? Is it smooth or bumpy? What size is it? How has it always looked like this? Without any extra info, my guess would be a bleached ricordea.
its smooth and its about the size of a nickel. didnt buy it just found it one day when i was rearranging my tank. its alwasy looked like that and hasnt grown since ive discovered it. oh yeah it doesnt like LIGHT....lol
Bleaching is caused by stress - temperature too high, not acclimating properly to lighting system, water quality issues. Lower it in the tank and give it time, hopefully it will recover.