Green Sinularia Closed

[khrios]

This afternoon, I noticed that my sinularia had closed and become much greener on the top and very condensed, to maybe 1/2 of its normal size. I also noticed a thin oily film at the top of the water. My xenia an zoo seem to be unaffected, and the sinularia opened slightly about an hour later, but looked very shriveled. It looks much better in these pictures, but these were taken several hours after, hence the actinic lighting. Here's the foam

the oily film