Hammer coral - should I worry

Sticker shock

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I have a hammer coral that has a little something going on at its mouth. It appears to be gaping a bit or maybe I should say stretching. Otherwise it appears to be healthy. Is this something I should be concerned about or is this normal behavior (maybe spiltting)?

It spreads out at around :27 so you can see the mouth.
 

El_Guapo13

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Video won't play.
Screenshot_20200121-130920_Samsung Internet.jpg
 
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Sticker shock

Sticker shock

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Just watched the fixed video. Is the hammer doing that itself, cause to me it looks like it is just that the tentacles are being blown away from the mouth by the water flow. What is the flow like in that area?
I would say its pretty low flow there...it actually right next to a anchor coral and there are no issues with that one. The hammer was in a much more direct flow zone before, but I had to move it during a rescape.
 

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