bubble coral

[marlin06]

my bubble coral hasnt been himself lately.hes been deflated for a few days.all of my other corals (toadstool,pollip,mushrooms)seem to be ok

 

[mmkeeper]

Has it closed up before? My bubble will take all kinds of forms depending on light, flow, food and moslestation. It can change in just a few minutes. Sometimes it might take hours to open back up. It thinl once it took a few days.