zoa after feeding....?

So I feed the corals today for the first time with a baster...no problems it took the brine shrimp, closed for about an hour, opened and pretty much everything was gone and now the ones I fed looks like the picture below - the tentacles looking things around the perimeter of the fed heads are tucked the opposite direction. What does that mean??? It seems like its only the ones I fed. All the others look fine.

salts001-albums-corals-picture1684-imag1078.jpg
 
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