what is this thing? i noticed it a couple weeks ago and it hasnt moved but seems to be growing. it has a metalic look to it and feels sorta rubbery? it dissapeared for a couple days and now it is back in the same spot? not sure what to do about it. all i have in the tank right now is two perc clowns, cuc, and a coral beauty.
![PICT0102.jpg](/proxy.php?image=http%3A%2F%2Fi465.photobucket.com%2Falbums%2Frr18%2Fderek29%2FPICT0102.jpg&hash=b35c3205f4d34f3315cf5534e30935d8)